if a female is truly willing, does it actually matter whether she is married or single?
I think guys prefer a woman with some sexual experience, who does not play mind games, and is ready to lose her panties while out on the date. Married women know what is expected of them if they start flirting, and they are usally more than ready to deliver.
Many single women ration their pussy too much, acting very "nun like" and try to put a guy through the hoops. This is the fastest way to push your boyfriend into the arms of another woman who will have more empathy with your b/f's needs.
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