There's another relationship aspect of this dynamic, and both men and women are often guilty of it, although my experience is that it's more men than women when it comes to the bedroom.
Women tend to demonstrate this behavior in a relationship with equal frequency, but in other ways.
And boy, if she introduces you to her family and friends, you are the one she wants to keep.
A subgroup of men with an avoidant attachment style suffer from a condition known as the Madonna-whore complex.
Don’t worry, the positives outweigh the negatives, you just have to take the time to understand what's going on with her.
The anger that formed in early childhood leads the avoidant man with a Madonna-whore complex to seek revenge.
Took all of my money, isolated me, spread lies about me.
His mother was a borderline and he treated me like the way he hated her.
Put in more common terms, we men often seek out 'good girl' types who aren't aggressive or very experienced sexually, but then want them to behave like a freak in the sheets.
Other men seek out women who have a great interest in sex, all kinds of sex with all kinds of people, and then want them to be monogamous and express their sexuality only receptively to the men's wishes.