[Ren shrugs a little broadly, though he still looks more amused than anything.] Why does anyone want to sleep with anyone...? Because you're interesting and strong, and you have the sort of personality I can work with~

[Because that's definitely all the things normal people factor in, right? But physical attractiveness is more of an afterthought for Ren. If someone looks average but is interesting in all other ways that actually matter to him, he's not going to turn them down just on the basis of looks.]