'who would you rather fuck?' that's yikes, but I hope it doesn't bother you if I ask you a question that goes in the same route. IH's often says that Ichigo wasn't attracted to Rukia in the least, which is stupid considering Ichigo's actions (what he feels for her is so much more than a simple attraction) When Ichigo was 15 yo he wasn't normal but he was a teen nonetheless, so from the point of view of a guy, would you have liked the pretty girl sleeping in your closet when you were 15 yo?
Would I have liked it? Yeah, probably. Mostly. It’s a bit of a mixed bag in that you’d suddenly be losing a fair amount of privacy, and gaining more than a few responsibilities, but it would also be interesting and exciting, if mostly for the company one would gain.
People like to cast relationships and even proximity as being about sex and physical intimacy, and those certainly can be very important if you’re establishing a relationship, or in one, for a wide variety of reasons. But at the end of the day, relationships are really about company. They’re about not being alone. A lot of people will settle for subpar relationships purely out of fear of being alone.
And I think that’s a large part of the allure of Rukia-in-your-closet. It’s not being alone. We never see them have late-night talks or anything else, but you know they could’ve, and probably did. That’s what I would’ve enjoyed most even at that age, and what I enjoy most now: sharing experiences with others.
Another thing that would be appealing is the exotic possibility. It’s not so much the hope that something might happen between you, whatever that might be, it’s simply the possibility that any number of things could. There is this element of “the surprise of the unknown” inherent in the situation, as well as a certain thrill that his family might discover her. It would be exciting. I don’t mean that even sexually, although you can imagine incidents that would occur from people sharing space, I mean that it’s simply an unusual and therefore intriguing situation.
I would have likely enjoyed it, though I doubt I’d have been so thoughtful about it as Ichigo is.
As to him, you can tell he liked it a lot, because he assumed she’d want to just go right on back to doing it before she stated her intent to stay in Soul Society, and you could see his disappointment before he accepted that what she wanted was what mattered. Those two months were honestly probably the best of his life.