@Kardamom The majority of the guys I know wouldn’t screw it up or take the chance of getting a girl pregnant, because they don’t want to be a father just yet. Just because the girl is the one who gets pregnant, doesn’t mean we aren’t effected.
@JLeslie The only other method really available to me at the moment are condoms. In non-committed relationships or what have you I have used them pretty frequently (not 100% of the time, but most of the time). The reason I don’t use them, whenever I don’t use them (including now that I’m in a committed relationship with a girl who is on BC)... is largely that they are uncomfortable and inhibit the actual sex-act (which has been agreed upon with virtually every girl I’ve ever used one with)... and secondarily (but much less importantly) the added cost when you’re already paying for and using a method that’s even more effective.
@wundayatta I don’t have an actual study to point to, but I can say for fact that at least half a dozen of my guy friends and myself would sign up for male birth control right away. In fact I would rather I take it so my g/f could stop… she’s not a big fan of the effect it has on her mood.