If a women thinks there is zero chance of manipulating you, no sex. It’s pointless.
If you are already doing everything she wants, no sex. Because there is nothing to be gained.
If you have some value to her and you are NOT behaving the way she wants you to, but there’s a chance that you will come around if she fucks you, then she’s going to fuck you, because you represent a challenge.

So nice guys don’t get laid because there is no challenge and they are already kissing her arse anyway.
Totally hardened men don’t get laid once she realises what they really are, but she’ll probably take a while to wise up.
Bad boys who are obviously difficult to manipulate but might come around if she pulls out all the stops are in demand because they represent a challenge.