Female Sexuality and the "50 shades" desires, normal or dysfunctional?

I've noticed a lot of women both on GLP and in real life talk about female sexuality and their desires with pride. They talk about being dominated, rough'ed up, hair pulled, and are proud of these submissive desires in the bedroom. And when a man is confused by how strange it is that so many women want this in bed, a woman's response is just "get with the program! ALL women want it this way!"

My question for everyone is do you think this is normal for all these women to have these desires to be roughed up in bed, or is this dysfunction? I haven't had a lot of partners, I'm in my early 30's. So I'm looking for opinions from older men who have had more experience. But from what I've noticed, the more partners a woman has had, the more obsessed she is about having these submissive fantasies fulfilled.

For example, I dated one woman who had only slept with 1 man her whole life, and she related a story to me about a man who started pulling her hair while they kissed, and she told the man "WTF are you doing? Why are you pulling my hair??!!" And the man said "uhhhhh, don't you like that?????" She said the guy's mouth dropped because he was so surprised there was a woman on this planet who didn't like having her hair pulled.

So I'm starting to think that women who need to be dominated in bed are dysfunctional due to having so many sex partners. Dysfunctional meaning they are not adequate for marriage and family. Even if you are very dominate sexually and enjoy roughing your partner up, eventually she will find a man who is more manly and dominate than you and she is going to be sexually attracted to him instead of you. "There's always a bigger fish" as they say.

When a woman has had very few sex partners (0 to 3 I'd say), they seem to really be able to connect and sexually attract to a man, without this masochistic need to be with the guy who is the most dominate monkey in the room. What do you men think?