The fact that Sun's underwear came off before Jay had even unbuttoned his pants says so much. It speaks to the trust Sun was placing in Jay. His willingness to bear himself open completely. Sun had spent so long fighting against Jay's attempts to top him as well as dominate him. This shows that he has thrown all of that out the window. He's accepted his submissiveness and is letting Jay decide when penetration happens. There's this whole kink under the D/s umbrella in which the submissive partner is naked while the dominant partner is clothed. It's another way of giving the Dom control. They aren't fully engaging in it in this scene, but the idea is there. Sun unbuttoned Jay's shirt, but it's Jay who took off Sun's pants, and, as far as we're shown, Sun didn't attempt to do the same with Jay.
Which just goes back to letting Jay decide when the important part of the kind of sex that Sun has submitted to will happen. Not that penetration is inherently the most important part of sex, or that it's even needed to count as sex, but it's clearly important to them, and it's anally bottoming that Sun has been so resistant to. It's the act that carries the most significance for both of them. There's no chance that Jay will ever bottom. It was always down to Sun agreeing to take that role. To understand that he wanted it.
There's also the fact that Jay has been bared open for Sun in this way the whole time they've known each other. He exudes Dominant Top energy so strongly that I would be surprised if even non kinky people can't feel it. Sun could feel it from the start. Especially since it was very quickly directed his way. Yes, the fact that Sun is a submissive bottom was clear to Jay, but it would be quite difficult for most people to see that, and it was something he was hiding from himself as well. So it was he who needed to physically demonstrate that he had accepted that, both to Jay and himself. To lay himself bare in a way Jay didn't need to.
Sidenote, I can't be the only one who thought this was one of the hottest shots in the scene:
It feels a bit crude to say it like this, but Jay had been trying very hard to get Sun to spread himself open in more ways than one, so demonstrating the fact that that had happened so visually, with Sun looking completely vulnerable and at Jay's mercy, is one of the sexiest sights I've ever seen.
How is any sex scene ever going to be even remotely this good













