They call it sexual compulsion, but sexual addiction can be treated. I have treated many people with it. Sexual addicts are driven and cannot live without sex. They can't cope and can't do things. To feel loved.
Women bring much more emotional feelings to sex than men.
They want to feel appreciated and valued. It is like the first moment I show interest, she is not interested. The problem is with them or you. They might just be flirts and when you respond to the flirtation, that is all they wanted. But you might be showing too much attention or you may move too quickly.