First of all, it's just my opinion but, I don't believe in bisexuality.
I believe we're capable of performing with either gender but, there is a primary orientation, Bi's just haven't admitted it yet.
Most straight men would never consider trying same sex experience, though the thought may have entered their mind.
Just because you've thought of it, doesn't mean you want to do it. To a straight man, the thought of a male, with a beard, a hairy ass, a dick, no curves, no tits, a low voice, high testosterone, low estrogen, etc. is a complete turn-off. Especially the thought of kissing one.
As well, most bi's and gays aren't faithful, so you will be a disease risk for a female partner.
"Not that there's anything wrong with that."