bi-curious huh? i think it would be alright to ask but it depends on his situation atm and what type of guy he is. girlfriend? do only you know he's bi-curious? is he a silly type of person? macho type? if you do ask do you think it'll make things weird between the 2 of you as roomates? or if he isn't interested would he laugh it off? probably best to ask him when you're both alone or something and in a discreet place where he'll feel safe and comfortable enough to get it on with you ;p