" The centrality of fidelity shows up indirectly in the tactics employed by women to derogate mating competitors. Saying that a rival cannot stay loyal to one man was judged to be the single most effective derogation tactic for a woman to use in the marriage market. Calling a rival a slut, saying she was loose, or telling others that she slept around were in the top 10 percent of effective derogation tactics.31 "

― David M. Buss , The Evolution Of Desire: Strategies of Human Mating