-He still gets flustered thinking about her sometimes but he's too stubborn to let Charlene to know that.

-If someone was to ask if he thinks Charlene is hot he'll yell at you "OF COURSE SHE'S HOT WHAT KIND OF QUESTION IS THAT!? ANYONE WITH EYES SHOULD KNOW THAT!!" or if he's less defensive he'll just say "Yeah, she's way out of my league I still don't know why she even married me."

-He met Perry while he was still emotionally recovering from his divorce but Perry actually doesn't know that.

-Doofenshmirtz refuses to give details to Perry about his marriage or divorce with Charlene. If Perry gets curious he just tells him "There's nothing to say about it, we were married, we wanted different things, we divorced. What else am I supposed to say??"

There's obviously more nuance and details to that but Doofenshmirtz decided this is the information he's going to gatekeep from Perry the Platypus.

-He swears he's completely over Charlene and that he's not upset about it anymore but then then the next day something reminds him of their relationship and he breaks down into tears. It's kinda pathetic.

-He kept his wedding ring. He swears he'll sell it one day but he gets too emotional when he even thinks about doing it.

-He learns from Charlene that she does actually think about him sometimes and wonders if he's doing okay. And he responds with, "That's . . ." *was about to say something else* "a waste of time. Why. I- that's- you really don't need to think about me like that."

-He doesn't talk to other divorced men who are open about being divorced because he swears all they ever do is complain about their ex wife and he thinks it's cringe and he's too bisexual for that straight nonsense.

Imagine that Perry knows that he's divorced and Perry assumes he's gonna elaborate on that eventually. But time goes by and Doofenshmirtz never brings up his history with his ex-wife. So he wonders what's up with that. He points to a picture of her one day and Doofenshmirtz knows he's asking what happened with his ex-wife.

And then Doofenshmirtz raises an eye at him and says, "Why do you wanna know about that? A little personal don't you think?"

And Perry sits there miffed that Doofenshmirtz can tell Perry about his most embarrassing memories and deepest of truamas. But his ex-wife is where he draws the line??? So he gets pouty about it. And Doofenshmirtz just tells him nothing happened. But clearly something happened and Perry won't let it go. So he vaugly tells Perry "We wanted different things." And doesn't explain himself.

-He's an intersex coffee bean transmasc cistrans man who's bisexual

-Doofenshmirtz socially transitioned around 13 years old with little support. He realized he was intersex and transmasculine in his 30s went on testosterone HRT in his early 40s. He got top surgery a few years after he met Perry the Platypus.

-Doofenshmirtz helped Perry realize he was intersex by talking about his own intersex experiences. They both weren't assigned a gender at birth. Information about Doofenshmirtz got lost and Perry was just documented as the H slur and assigned male by Phineas and Ferb. They both don't know what their intersex variation is, they just know they're intersex.

-He has untreated ADHD. He also has C-PTSD and borderline personality disorder. He doesn't have a diagnosis for BPD but later in his life he gets treatment for his paranoia and depression so he can be a healthier evil scientist.

The BPD is unrelated to being evil he's just chosing do evil (a very weak attempt albeit), his relationship issues and paranoia of getting hurt by other people what's related to his BPD

-He has arthritis, has a scar from scoliosis surgery, he's lactose intolerant, he has seasonal allergies, he's far sighted and uses reading glasses and naturally ambidextrous

-His feelings about his bodily appearance constantly fluctuates. One day he can feel like the most disgusting ugly person in the world and the next day he's spitefully in sexy clothes walking around like he's the sexiest man in the room. There's no in between to be honest.

-in his 20s he wanted to be an artist and express his pain and creativity but he lost his passion for it and gave it up. He's actually a pretty good painter but he got art block ages ago and gave up on it.