I was just married for 10 years and was a "slut" for my job (meaning, I worked 6 days a week and spent the rest of my time with a blackberry). My ex was cheating on me with an old flame from high school, then cheated on him with a poker buddy (her poker buddy) and then cheated on both of them with her (female) cousin (by marriage).
I am dating now. I am not a bad catch. A normal guy really. However, in the back of mind I am always wondering if I am the first or second guy that she has kissed today.
Honestly, if a provider wanted to be with me (without treating me like a wallet), then at least I would know that I was first in someone's life and not a doormat. The idea that she is "pleasing" other men is kind of a turn on if she comes home every night to me (and does the dishes).