Re the other post about sex 3 times a night, I think it gets better as you get older (more experience, less nerves etc).
I mean, it's tons better now than it was when I was 16 and I view it as the ultimate means of expressing love, so if my H didn't, I would think he didn't love me.
I can't imagine that I will get to 50 years old and suddenly not be bothered. As for your W's view that sex is a male need, I don't think that is true.
I think it's a human need to share and express love. I think the difference is, men tend to concentrate more on the physical sensation and women on the emotion connected with it and maybe your W sees it as a purely physical act which might explain why she sees it as a male need.