Good guys and crazy women

I have witnessed several of my guy friends being drawn into misadventures with unstable women. Even when all signs point to danger, they somehow get caught up in the relationship. Why do so many good guys and crazy women end up together?

The physical attraction part is understandable and I get that part. I am just baffled when the crazy behavior from a woman somehow gets overlooked. Men will go back to women after she has destroyed property, threatened them, or even put their careers at risk. Do men mistake psycho behavior for passion?

Even when they manage to get away, they begin to draw other unstable women. Now they are crazy chick magnets and the normal girl has to compete with those types. So unfair.