Women usually collect notches on the doorpost after some big kick in the teeth. The urge passes though.

For women, I think the great rites of passage might look something like (in modern times at least:

Learning to weed out the good seducers who are "merely" good in bed.

Learning to look past initial hyperbold rhetoric a guy spews thinking he means it.

Learning to recognise when guy has put zilch effort into a relationship and then says here's what's wrong with YOU ...

Learning to leave someone who is just plain boring ...

And I agree with the abovementioned one about someone who pretends to be interested in what you are just to get in. I have noticed this usually correlates with that person sabotaging same itmes in your life out of insecurity ( heaven forbid anything should be more important to you than he is!)

Of course these issues may have the genders reversed. Feel free to add any important ones you think I missed.

Oh, and I hope your friend meets lots of nice ladies. Nice guys deserve it.