Why do Women Screw so much at the start and taper off as marriage approaches?

Can I post my theory and it's based on psychology.

Women want what they can't have.

Stability, Security, Intimacy.

lacking that they are driven to find it.

A guy that isn't really committed to them offers it fleetingly. They try to secure it, but the guy that is aloof she could loose all of that. She could be replaced by another women. She goes out to prove that she is better than the women that the guy could trade her in for.

Better in bed, better looking, better personality.

But once they have 'captured' their prey like a cat holding a mouse it's not appealing. She doesn't have anything to prove, she 'owns' her man.

So she doesn't have to put out as much, and she secretly wonders if she can still out 'status' the women around her by going out to get the forbidden cock on the side outside of the relationship.

?