How do you know when a woman has had sex?

Sorry, but there's really not much of a scientific way of telling for sure without asking her and her being honest with you. Some people say if the hymen, the thin stretch of skin over the vaginal opening, is missing then she must've had sex. This is not true because even common daily activities and cause this to break, or she could even have been born without one. For instance, wearing a tampon will stretch or break the hymen. Besides, I really doubt you will find a woman who will willingly allow you to investigate that.

So, just ask her, if you two are close enough and it is an appropriate time to ask her. Hopefully, she will be honest with you.

First answer by Amlove32. Last edit by Amlove32. Contributor trust: 420 [recommend contributor]. Question popularity: 1 [recommend question]