Interesting story - the lead singer of Bush, Gavin Rossdale, dated a cross dressing club guy in London for like two years. Afterwards, he married two women, the second being Gwen Stefani. He's always downplayed it as experimentation and that he decided he only liked women afterwards.
Now I knew my share of experimenting women in college, who later went on to only date/marry men and I believe they were truly just experimenting. Yet with a man, I can't help but feeling they just decided to suppress their true urges for men. It's a double standard, but hard for me to picture a man that truly gives up that urge. So I think men can be bisexual, but they can't just "go straight" after experimenting with men. I just feel there are different dynamics with men.
I remember when it was "cool" for chicks to make out in bars, and know women who that was all they did - it was more of an attention thing they wouldn't go further. A woman I used to date was like no I'm not attracted to women, but maybe if I was drunk enough I'd let one go down on me. Another was always asking if I wanted a threesome (ah, she was crazy so had to let her go but some good times), but it was on some "I really want to please you" shyt, she wasn't attracted to women like that. Not to mention all the straight women I know who get lap dances/flirt with strippers but that's all they do. Lol, men just don't think that way unless they're gay/bisexual.