Well I've racked my silly little blond brain cells and I can only (without surfing the net for it, which I probably don't want to do) come up with:
1.Heterosexual
2.Lesbian
3.Homosexual
4.Bisexual
5.Transgender
6.Transvestite
7.Celibate
8.Married
so what are
9
10
11
and
12
On noes don't go searching for that
Here's how I as a boring old bloke wot fancies women worked it out like
Ignoring illegal stuff, siamese twins and domination stuff (eurgghh) or even maggots I start with 6 possible gender variants
Male
Female
Hermaphrodite (both bits)
Sexless (none)
Transgender M->F (bits lopped off)
Transgender F-M (bits constructed?)
So [geek mode] there are 6!/2 unique combinations of which type fancies which type and that's over 300! They must have slimmed it down a bit to get 12 [/geek mode]. And I suspect we'd all find ~11 of those a bit sus.