Cougars and Pumas and Bears, Oh My!

What food is guaranteed to lower a woman's sex drive--wedding cake! This is an old joke but is it really true? As women get older (30s and 40s)we hit our sexual peak and find that it's the men who are complaining about headaches and being too tired for sex. Is is because of marriage or they are getting older? Why are older men not into sex? Are they going through a male menopause? Is this why older women are dating younger men? What is an acceptable sex drive and if one partner feels that isn't enough, then what? Is it wrong for older women to want younger men?