That's not many compared to the plethora of songs that are about how the female form is pleasing to the eye. Women and men have sung about curves and women acquiescing for years. The focus on the behind is interesting though because it's the first time women have joined in on the odes to a certain female body part.
As the Stylist article points out over time many parts of women (when oh when will we just like all of a woman?) have enjoyed more attention than others. "While it's highly plausible we'll look back on this time in contemporary culture as The Era When Everyone Got Their Bum Out (A Lot), the fetishising of a body part is nothing new."
I lived through the nineties, before JLo invented the female bottom in the film Anaconda, in which we couldn't decide between waifishness and massive tits. But while boobs have a back catalogue of songs about them by men, The Who, Iggy and the Stooges, Frank Zappa, AC/DC women never really sang about breasts.
if you are a woman and you want to sing about sex the real mystery is not so much that you sing about it only in the context of objectification but that you never sing about your vulva
But really if you are a woman and you want to sing about sex the real mystery is not so much that you sing about it only in the context of objectification but that you never sing about your vulva (singing about the act of cunnilingus is not the same). Oh I know the odd act has indulged in a crotch grab but that could just be a sneaky choreographed scratch - don't tell me we haven't all succumbed to a yeast infection.
Perhaps ultimately we are fetishising the sight of a woman leaving. I just hope the door doesn't hit us in the ass on our way out.