I mean according to the rules of consent, depending on how drunk said straight man is, I wouldnt call him potentially gay or bi, but maybe a victim...
But assuming he's "not drunk enough to not consent"( guarantee that phrase will definitely bite some of you guys with daughters in the ass in a special way), yeah definitely some degree of homo/bicuriousness going on there.
And no, Ive never thought of having sex with another man, becaaise I dont find the male form(or genitalia) attractive on any level.