Freedom ain't free. It is fundamental to reality that people can and will lie. That a man might feign greater interest in commitment than he actually has is but one example of this.

Thus, a woman who actually cares to not be "pumped and dumped" would avoid having sex until they've recieved whatever it is that they expect to be tied to sex in order to not feel as though they've been "pumped and dumped", be it commitment, marriage, or a goat sacrifice.

Of course, what exactly does it mean to "commit" short of marrying?

Ultimately seems pretty illusory "oh sure we're in a relationship"...have sex...and then "well, I'm not really feeling connected to you. Best of luck".

Only marriage has any kind of potential friction for breakage...though even so, anyone can leave even a marriage at any time for no reason or any reason.

Bottom line is, if you haven't received the thing you want in exchange, you're accepting the risk of never receiving it.