Women (and some men) are failing to understand why what this girl said is so unattractive and disgusting to men.

No guy wants to marry a woman who hooks up with random men or has friends (with benefits).

Most guys enjoy random hookups and friends with benefits. But they don't want to marry those kind of girls.

By telling him she would never hook up with him she is telling him

1. that she doesn't value her own purity and so isn't wife material.

2. That he isn't so attractive that even if she couldn't marry him she would sleep with him.

It's both disgusting and insulting. I would run. Run dar run fast.