There is no hard number but it's more about the mental and emotional aspect.
A chick that has been ran through you can tell from the first interaction. She got a tired aspect to her and she seem visibly jaded/faded and got a glazed look in her eye.
Now there are nymphos who can have sex with hundreds of Men like it's nothing and retain no emotional attachment. But you know damn well that's 1 in 100, and the problem with those is that what is preventing her from going on to the next Man after she gets bored with you. The problem is a lot are mentally immature and have the mind of a 10 year old girl in the body of a 30 year old.
A lot of it is chemical too. Chicks with high estrogen typically get fukked up more in the head and volatile bi-polar emotions when a nikka be all up in her. The ones with high testosterone are more logical and don't associate emotions as easily to the Man just because he dikked her down.
So it's not really about the number, but if you as a Woman are longing for another nikka from the jump when getting to know someone new then
And don't be fooled. Just because a Woman is "well put together" seemingly on the surface don't mean she ain't one of those former hoes.
Basically a lot of this is solved by making sure the chick is more interested in you than vice versa. That way you retain the control in the relationship.
Look at Rob K. Chyna been knocked up by a thug already and had a million Men smack her ass but she is entranced by Rob.
That's why he can feel comfortable wifing her because she loves the idea of being with him and the image he allows her to project more than Rob K. the man himself.
This is very critical aspect to pay attention to and the majority of brehs miss this point.
Put it this way, a million nikkas can hit but a chick can be head over heels for a nikka that don't even WANT her. As long as you are that nikka for her, then all is good. But if she's like:
Then don't even engage, period. It will be all downhill from here and she will be forever comparing you to past nikkas