So I've been Celibate and plan on staying Celibate for a while. I have a buddy. Alright, I've known this kid since I was 14, at which point I had a huge crush on him in Highschool. That's irrelevant, as I don't feel like I have any sort of crush on him now but I figured I'd add that in. Well, he has sort of become my wingman unofficially. We go out on most weekends and he ends up crashing at my place. Well he has this god awful habit of sleeping in his boxers. I'm not a horn dog by any means, but it doesn't fuckin help when he's cut as fuck, covered in tattoos and is just overall good looking even though I sorted him in the friend zone years ago. Anyway, I usually have myself under control but I think my celibacy is making me more perverted than usual. I keep having sex dreams about Norman Reedus (not that i'm complaining) and sex dreams all over the place.
So the advice. How do I politely tell him to stop parading around like a French whore in his underwear when he stays over. I jokingly said "Put a shirt on, what are you that kid from twilight?" and he brushed it off. I don't wanna be rude but I don't want to make him uncomfortable either by being "Seriously dude I'm about to fucking rape you if you don't put your clothes on"
Halp.

Scribz your input please.