Gayer than Macauley Culkin singing show tunes...
Bisexuality became so fashionable for women because if you’re gonna get busy with a woman, it might as well be a real one. :)
There is some truth in that observation, but I prefer to think of it as part of our modern cultural continuum which rejects "the normal" as it deconstructs the very idea of value. A prominent manifestation of that effort is to celebrate the weird, the bizarre and the perverse.
And so homosexuality is cheered and its exemplars promoted in only the most positive light, while "traditional families" are scorned. Gays on TV and in the movies are almost uniformly warm, sensitive, kind, thoughtful and funny people. In real life, some of them really are those things, but that's not the point.
For their part, the bad guys are often, well guys - traditional masculine types who drive black pickup trucks and drink beer (as opposed to Priuses and Chardonnay). They physically and/or emotionally hurt the women in their lives, who run (of course) to their girlfriends for comfort - which I suspect is no accident.
It is no accident, either that many New York and Hollywood scriptwriters are as gay as... well, if not "Macauley Culkin singing show tunes" than perhaps Liberace in a gold jumpsuit throwing kisses to Calvin Klein. It does explain a lot.