anybody who says no is a liar. Or mentally insane. Easy to say no when its hypothetical but if it came to the crunch you'd be sucking on that dick like it were a fruit ice lollie on a hot summers day.
Gay porn and prostitution are full of straight guys sucking dick and taking it up the ass for as little as a few hundred quid. Even much much less in more desperate circumstances. Just to put a million in perspective.
you can always rinse your mouth out after with a nice mint mouthwash.