Or whatever they're called.
To me it's obvious they're designed to accentuate a woman's rear end, for the benefit/attraction of men.
But that's OK, why do women pretend they never do anything to try an attract a man, when biology/history shows that's pretty much why we're on the planet and occupies an awful lot of time, from puberty onwards.(and vice versa)?
If women want some sexual attention they're perfectly free to behave in whatever way they believe will get it. Why do those who do it deny it and women who see it judge it?
Others might do it differently, in ways they consider less obvious, but it's there.
Why is it a bad thing?