Breasts.
It's impossible to be neutral about them. Are they decorative? Functional? Recreational? Obscene? Totems of momism? Natural? Too big? Too small? Too saggy? Too artificial?
They might be one of the best marketing tools in Twentieth Century America and beyond. Seen a Daily Kos T-shirt draped on a pneumatic model, lately?
One thing is for certain: breasts are mammalian exocrine glands, and I'll take you on a short tour of their evolution, their forms, their function, their physiology and some of their quirks.