No, just how two faced and nasty they can be.
Most women find it quite easy to gain the confidence of men so that they can exploit them. Interacting with prostitutes soon provides a good reality check, and I've learnt through that how to deal decisively with manipulative civvy women.
Yeah, women are generally manipulative, but they just do it to test a man. See how tough he is. If she manipulates you into buying her dinner, or whatever, she then knows you're a bit soft, and won't respect you, never mind have attraction toward you.
In a way, a relationship with an escort is more honest than one with a civvie.