Everyone's bisexual, or as I prefer more accurately, 'situationally sexually fluid.'
Guy can id as straight all his life then suddenly in prison find himself 'making due' with same-sex sex. Or if he does 'gay' porn, is an actor playing a gay role, gets drunks, or simply enjoys a blowjob in the dark and doesn't realize it's a guy pleasuring him.
Absent our sight, we'll enjoy sexual stimulation from same-sexes just as we would opposite-sexes. Sexual enjoyment, or lack thereof is purely psychological. We make a decision whether to enjoy it or not. But if we don't know who's giving us those pleasures, we'd enjoy same-sex sex not knowing any different.
Everyone's mouth and bottom feels just like a woman's. Perhaps better since only another guy knows how things feel.