Since watching "Where's My Gender?" (2025) for the first time a few days ago, I have become obsessed with trying to piece together the story behind Fils D Frank's videos on Youtube. I was shocked to see that nobody was posting any theories online, so I will amend that with this post, in which I will investigate the question of what Zender's gender actually is. I do not have a definitive answer yet, so i will instead discuss several different possibilities.
This seems to be the most straightforward interpretation of the video. Zender is shown switching between male and female clothes, seems confused about the question of gender, and is referred to using different (and increasingly non-traditional) pronouns throughout the video. Therefore, it seems reasonable to assume that the video's chaotic and difficult to understand nature is a reflection of Zender's own struggle to fit into either male or female gender roles.
I am inclined to believe that this explanation is too simplistic, though. For one, the chorus refers to Zender as "her" repeatedly, which throws a wrench in the previous theory about the pronouns becoming less and less similar to "she/her" and "he/him." Additionally, the video seems to suggest that Zender's gender confusion is inauthentic, which I will elaborate on later.
Finally, there seems to be a common theme of "transformation" woven throughout Fils D Frank's videos. For example, the Peanut Butter Man's transformation into the Human Butter Man is another big point of emphasis in the story, as well as the death of Sarah and emergence of Fils. The title of "They Took My Gender" suggests that Zender's lack of gender is not voluntary but rather was forced. This claim is further substantiated by the fact that in that video, we see the male version of Zender on an operating table being cut to pieces in a quite literal sense. This suggests that Zender once had a gender, but they lost it for reasons outside of their control.
This interpretation also seems highly plausible based on the videos. In "Where's My Gender," Zender starts off male, and the male version of them is seen being wheeled into a hospital on a gurney. "They Took My Gender" shows Zender on an operating table being cut to pieces and afterwards wearing the female clothes, suggesting that they underwent some kind of medical procedure to transition from male to female.
Another piece of evidence for this view is that in earlier videos such as "He Should've Ate Me," Fils appears to have a more masculine body, as they are shown shirtless without their chest being censored. However, in "They Took My Gender," Fils has a more feminine body. They are shown covering their chest and looking down into their underwear, presumably seeing nothing there. I believe that Zender is a representation of Fils due to the fact that they are shown with heterochromia in the beginning of "They Took My Gender," and Fils also has heterochromia. Additionally, Fils' body and movements seem to mirror Zender in both "They Took My Gender" and "Where's My Gender."
Finally, the continued use of she/her pronouns in both videos to refer to Zender suggests that they may have transitioned to female. The chorus of "Where's My Gender" says "gender bender / can't comprehend her / she's a gender bender."
This would also seem to explain the Gelatinous Jelly's question of "Why aren't you gay? Maybe there's a delay." One common response to people who come out as transgender is "why can't you just be gay?". Additionally, many people believe that being transgender is a phase that the person will eventually grow out of, which could be why the Gelatinous Jelly believes there's a "delay" and Zender should "give it 1, 2, 3."
Ultimately, though, I still do not think this captures the full picture. The main reason is that the videos suggest that Zender's gender presentation is not authentic. The clearest example of this is that when the "strawberry gender" appears on screen, it is accompanied by text saying "we're not sure that it's really strawberry." Additionally, the chorus in "Where's My Gender?" keeps repeating, "I want to send her out," and in "They Took My Gender," the text on screen says "gender end her end her end her." These lyrics potentially indicate that Zender is not really happy being a woman. Finally, when the surgeons are operating on Zender, they say, "let's break her," and afterwards Zender says, "I think something broke." A trans woman would be happy about having a more feminine body and appearance, but it seems that Zender does not feel that way. This is further supported by the fact that the text "Where is my body?" flashes on screen while Fils is looking down their pants, implying that the changes to Zender's body were unwanted.
This theory uses much of the same evidence as the "Zender is transfem" theory, but reversed. Perhaps the chorus' use of phrases like "end her" and "I want to send her out" indicates that Zender feels uncomfortable with being female. Additionally, when Fils appears in "They Took My Gender" with a more feminine body, they are wearing men's underwear, perhaps indicating that they are trying to present more masculine despite their body. When they look down their pants, perhaps they are experiencing dissatisfaction with the fact that they do not have a penis.
This also offers an alternative perspective on the Gelatinous Jelly. I find it plausible that it represents Zender's "inner self" for a few reasons. Firstly, I have already discussed the fact that Zender is shown with heterochromia, but the Gelatinous Jelly also has heterochromia, which by this theory would suggest that it is also a representation of the same person. Additionally, Zender describes themself as a "gelatinous jelly" several times, suggesting that it is the jelly and not the bread that makes them who they are. We know already that there is something inauthentic about the strawberry jelly they wear, so the fact that the Gelatinous Jelly is purple suggests a different flavor - perhaps one that is more genuine. When it asks "Why aren't you gay?", maybe it is expressing the fact that Zender is internally male and their attraction towards the Peanut Butter Man is not actually heterosexual. Furthermore, its insistence on there being a "delay" may be evidence that Zender still has yet to come to terms with their identity.
One piece of evidence that contradicts this theory is the fact that Fils appears to have a male chest in "He Should Have Ate Me" while wearing a mask of clay. In the next video, "They Took My Gender," Fils is maskless with a female chest. This could mean that Fils was hiding their true identity while living in a male body and the mask could only be removed after transitioning to female, even if this change was somewhat jarring.
4. Zender's gender is immaterial and serves as a metaphor for Fils' creation.
Perhaps fixating on Zender's actual gender is missing the point of the videos in the first place. Transformations of various kinds seem central to the story of Fils D Frank. The channel's description alludes to the death of Sarah and the birth of the alter-ego Fils, and there is a video on the channel about Sarah's death (although the circumstances of it remain unclear). Other videos constantly allude to the idea of identity, so it seems reasonable to infer that one of the main themes of the story is Fils' "rebirth" process.
The Peanut Butter Man's transformation into the Human Butter Man could be one facet of Fils' identity formation, albiet a rather sinister one. There are a number of videos dedicated to the Peanut Butter Man's assimilation into the corporate world and loss of his own sense of self. Most notably, "I'm More Than Just A Slice Of Bread" shows the Peanut Butter Man insisting that he is his own person in the face of demands to "lose your face, become like paste" and repeated insistence that he's "just a slice of bread." In "Human Butter," the next video on the Peanut Butter Man playlist, we see the word "help" on screen as he is quite literally torn to pieces, and then we see the creation of the sinister Human Butter. Then, in "I Know Who I Am," he declares that he is the Human Butter Man, which indicates a shift in his identity.
There is some evidence that the Peanut Butter Man represents a facet of Fils. In "It's Just A Slice of Bread," Fils' voice says, "I'm the Peanut Butter Man, you know?" Additionally, videos such as "You Know, I'm Worried About You" have Fils outright saying to Peanut Butter Man, "You'll always be a part of me." This further supports the idea that the Peanut Butter Man turning into Human Butter Man serves as a metaphor for the Fils' own transformation of identity.
Given this connection between Fils and the Peanut Butter Man, it seems plausible that the same could apply to Zender, who is also a piece of bread and the second half of a peanut butter and jelly sandwich. Perhaps their confusion over gender represents the broader sense of internal struggle that Fils is going through while trying to find their identity, and the actual gender of Zender is less important than the journey of attempting to discover it.
N.b. The Gender of Peanut Butter Man
One detail worthy of consideration is the gender of the Peanut Butter Man. Although it may seem self-evident that this character is male based on his name, there are a few videos which suggest otherwise. Firstly, in "Where Is My Gender?", we see Zender standing next to the Peanut Butter Man with the text on screen reading, "Oh to be the guy she sees. It's not me. Is it me?" which is also repeated in the video's description. The question arises: who is saying this? The most obvious answer is the Peanut Butter Man, but then that raises the question of who he is instead. The simplest explanation is that he is talking about being the Human Butter Man instead of the Peanut Butter Man, although there is also the possibility that he doesn't feel like a "guy." This may seem like a stretch, but I have a few more details from other videos that increase the likelihood of this interpretation. Alternatively, this line could be said by Zender to the Peanut Butter Man, which would then raise the question of why they refer to this character as "she."
My second piece of evidence is in the video "I'm More Than A Slice of Bread." In this video, Peanut Butter Man is consistently shown with one green eye and one brown eye. Fils' eyes, however, are brown and purple in this video. The only other character who has matching eyes is a blonde woman who appears on screen for only a couple of seconds and is shown looking side to side. Could this woman be the same person as the Peanut Butter Man? The final detail supporting this interpretation is that in the same video, when the Peanut Butter Man becomes too adamant that he is the Peanut Butter Man and he is more than a slice of bread, the circuit board lady says, "Stop her," after which the Peanut Butter Man is shown in the office with Fils. The use of the pronoun "her" is confusing because it is unclear who else it would be referring to except the Peanut Butter Man.