http://www.np.reddit.com/r/AskMen/comments/1g4a92/do_you_care_how_many_guys_your_so_has_been_with/cagpbdx

Gadflyii♂ 5 points 6 hours ago again, it is based on behavior. One night stands say a lot about he attachment type a person is, if they can view sex as a casual affair, then they are more likely to cheat.

Women who start having sex early in life are more likely to divorce. http://www.huffingtonpost.com/2011/06/24/relationship-between-early-sex-and-divorce_n_882681.html

Women who have more sexual partners are more likely to divorce. http://s3.amazonaws.com/thf_media/2003/pdf/Bookofcharts.pdf

http://socialpathology.blogspot.com.au/2012/03/promiscuity-data-guest-post.html

Promiscuity and infidelity linked: http://www.plosone.org/article/info:doi/10.1371/journal.pone.0014162

I wish I could dig out more but I am mobile.