Changed name for obvious reasons.
Provoked by this article - which is getting a depressing amount of traction, by a blogger on twitter called stavvers: www.donotlink.com/framed?43198
Short version: if your sexual preferences are linked in any way to the shape of your potential partner's genitals, then you are a bigot. So, eg, if you are straight, you should be attracted to men who have vulvas, and if you are a lesbian, you should be attracted to women with penises. (This isn't saying "it's totes ok to fancy trans lesbians or transmen", which would be cool, it's saying "if you pay any attention to the shape of someone's genitals at all, you are a bigot".) Any way of Doing Sexuality apart from stavvers' way is creepy and weird, and also cissexist and bigoted.
Most of this was aimed at women, naturally. Men's preferences were an afterthought.
In the twitter storm that followed, stavvers and her allies spent a lot of time tee-heeing about how any woman who disagreed with her was probably crap in bed, and all these lesbians who objected it this were prudes who didn't know how to have sex, were probably just holding hands in the dark, and .....dear god it was like a timewarp into the 1950s. Lesbians who choose not to sleep with people - men or women - who have penises are prudish and frigid! How hilarious! How new!
This would all be irrelevant if stavvers was seen as what she is (one of those tedious people who thrive on being "shocking" and "edgy"), but she's got a depressing amount of support for it.