The question is: "Why are women still wearing them?"
TFA talks about it a bit but, basically, it's sexier because of the curves it gives to the women wearing them (I apologize for being rude here but it gives them what many men consider a nicer looking ass). But IMHO it only started to make sense once women started to dress with fit/slim clothes. Which may be related what TFA mentions: that when they first started appearing regularly it was on nude or kinky postcards in the late 19th century.
Why do male like them, because, from TFA:
natural courting pose found amongst mammals, with an arched back and protruding buttocks
TFA talks about it a bit but, basically, it's sexier because of the curves it gives to the women wearing them (I apologize for being rude here but it gives them what many men consider a nicer looking ass). But IMHO it only started to make sense once women started to dress with fit/slim clothes. Which may be related what TFA mentions: that when they first started appearing regularly it was on nude or kinky postcards in the late 19th century.
Why do male like them, because, from TFA:
natural courting pose found amongst mammals, with an arched back and protruding buttocks