Do posh woman not give as much to their man in the bed as poorer birds?

I'm a male, 26 and i'm married to my bird..but i didint really want to get married, she kind of made me. I've got kids with two more woman, and they are all well looked after. I'm a good dad and make sure i spend time with my kids when i can, coz thats important, they are my flesh and blood. However, i'm you know, young and when my missus came along, i kind of felt forced into marrying her as her old man, had bought her a house and given us a load of money and well, to be honest life with this chicks good, on a practical level. Im a bad boy and i've had loads of woman since we started seeing each other, she dont know about only 2 of them, and she thinks i've stopped. I aint stopping man...lifes too short. Also i dont find her a turn on in bed..shes very restrained. Is it because shes from a good family? I found other birds much more willing to do dirty things and please me, but with this one got stale after 3 months. Shes got good **** and a great *** and all but she wants the light off when we do it. One woman i see will do it in my car ..in the middle of the day!! She actually calls me up and tells me shes horny. Whys this woman so out there and y and my wife so old fashioned? For instance as she has such good **** and *** i bought her some y lingerie from ann summers and i wanted to wear it for me...and strip...and she thats what s do. Whats wrong with her