Sorry how do you know that???
Erm.. yes they do. Hell yeah they do. The average modern day man does not have the patience, time, respect and emotional intelligence to date a virgin woman.
There are signs that women give off that lets us as men know what time it is. From the way a girl carries herself, how she dresses, how she talks, etc. We can tell which ones give up the goods early and which are actually chaste women to be taken seriously. The girls that guys will insult for not giving it up are girls we know are hoes and have decided to make us the sucker who she's gonna make wait before she gives it up. Actual virgins or girls who only give it up to guys they get in serious relationships are never insulted. They're the ones who men will wait for and marry.
I think the issue here is you think men are gullible enough to believe you ain't been giving up early to other dudes. Just like you ladies can tell the difference between a guy who gets p*ssy and a guy who can't get laid, we can tell the difference between a thot and a good girl. It's hardwired into us by evolution for us to be able to pick up on these biological cues.