The answer to the OP's question has to do with "empowerment," a vague and shape-shifting concept that seems to mean whatever the person invoking it wants it to mean. Apparently the woman in "Fifty Shades of Grey," who appeared to be demeaned and victimized, was actually being liberated and empowered. Go figure. Whereas in that song, the guy who was coyly suggesting that the woman who had already warmed to him might want to consider going to bed was being "assaulted." Go figure.
When to we get to songs like Donovan's "Mellow Yellow" and the Rolling Stones' "Stray Cat Blues," which sexualized girls age 14 and 15, respectively?