Friend I worked with who's now in a poly situation said he was in a sex club of sorts, was taken aside and two guys went down on him. He realised at that point he liked guys as well as girls.
But like we did, how do you know if you don't try it? Off our heads on Es but I slept with a gay guy a couple of times so it isn't like every one sticks to the paramaters set when you make your mind up.
In short, if you aren't hurting anyone, we should all just enjoy each other and try new experiences. TWSS "suck it and see"