Once a man-whore, always a man-whore.
A respectable girl doesn't like to get involved with a whore any more than a respectable man does. ICKY! That kind of extreme-marathon-style-sleeping-around-icky is like tree sap that you can't get off of the person you're dating. It keeps sticking to you and you can't get rid of it, you can't stop thinking about it, and the more you realize they'll never stop sleeping around, and always have a sticky coating of man-whore on them, you can see that the dirt sticks to them, and the grosser they get.