It's 'cause you guys are so cute~. And to thank you for taking good care of me, I guess.

[He honestly hasn't thought about it too much. He just... did it the first time, and then kept doing it. And then got oral about it. See, there's no problems here! It all makes sense! No one is getting feelings for anybody, this is just two bros vibing in the bath—]

You could eat me, but you won't, because you'd be sad and bored without me~. You'd have no cute human to keep you on your toes and love on you. We already had this discussion earlier, did you forget?