Eh, not to defend it, but I see the distinction. They're attracted to men, but choose to date women. So they're functionally lesbians, but technically not? I don't know, and I agree it's pretty stupid. If you're bisexual, why cut off your options like that? Heck, and in such a way...if you had to choose, it would make more sense to only date men, since there are more straight men than gay women.

The whole thing is silly, but it's pissing off the trannies, so it can't be all bad. Any sexuality that pisses of the trannies is alright with me.