Planet of the Apes

Ran across an interesting article about primates and how they "pay" for sex. Now I know where my ex-wife got the idea that I had to run errands and groom her before we could engage in relations. I wonder if she made all her other "gentlemen callers" do the same thing? The article also mentions the supply and demand of females, and how far a primate will go depends on the number of females in the area. That explains the one time EdGrimley was seen clipping that girl's toenails, she was the only female in the bar. This would also make a for a fascinating economics class in college, "The Supply and Demand of Coitus."