Gay for...boys? (and not in a gay male way)

Sooooo... i'm in college, and as such, i find myself at many parties. At these parties there are many, many, many...okay screw it- all the ('straight') girls, all of them sit (stand/lay/hop) there and make out with each other to grab the attention of males in the room. All while the actual lesbians stand around awkwardly watching this while trying to find a new beer pong partner.

is this...new? if so- why? if not... WHY?!

sexual fluidity or sexual from fluid intemperance?

thank you.