Ok, I've got a little time tonight. I'll dive in.
Let's start with the percentages that many of us list. Obviously, they're not scientific. But beyond that, they're not even divided between emotional and physical identification. When I say in my percentages that I'm 90% gay, 10% straight, no one besides me can really know what that means. For example, I could be equally physically attracted to men and women but be only able to fall in love with men. Or it could mean that I've never had sex with women, but that I'd like to some day. Or I could be one of those people who believes that we all have some bisexuality in us.
The next idea is how we each consider the breadth of our sexuality. I know gay men who occasionally fuck women. But socially and emotionally, they identify as gay. They consider the occasional hetero sex to be a kink in their gay sex -- not something that means they're not gay. And in the last few years, I've come to know a few straight men who have sex with men, and don't think of themselves as gay or bi at all. For them, these experiences with other men don't interfere with their perceptions (or mine) that they are straight.
I don't mean in any way to suggest that bisexuality isn't real or as significant an orientation as straight or gay. But folks have to self-identify. Far be it for any of us to define what straight, gay, or bisexual mean for anyone other than ourselves. In short, the men you refer to have a broader (not better or worse) view of what straight/gay/bi mean, at least for themselves.
For a much better exploration of this idea, see this
NY Magazine article from August 5. "Why Straight Men Have Sex With Each Other"
Peace.
