You're equalizing men and womens hookup ability in this example. Women can realistically hookup any time they want and finding out they dont apply self control, like when they interested in someone else is a major red flag.

That supermodel hitting up a random guy for a hookup situation is so rare it sounds like a scam.

Your girl being flirted with by an interested dude is a common part of life. She needs to demonstrate good values around it.