It’s just taking advantage of the wiring of your brain, like any advertisement wants to do.  It will definitely make me look, though.  A nice pair of boobs can make me crash my fucking car.  But that doesn’t mean I value crashing my car. 

On the other hand, I’ll tell you this: I tend to make my cover art very abstract; so abstract it often doesn’t even have humans in it.  If you’re looking for a get-rich approach, that’s not it. 🙂