I guess this is like when a female ape's ass gets red when she's fertile so the male thinks that hot and bangs her, then the male's ass gets red when azron bangs it, etc....
:)
Take note, fellas: when you meet a hot chick at a bar, and the next week you take her out for dinner and she looks a lot better than the week before, wait until the 2nd date to hit that. Maybe this explains why ugly people seem to reproduce a lot. You can't tell when she's fertile because she's just always ugly!
I never meant to reach that conclusion, but there it is.