There are some anthropological schools of thought which say that as our primate ancestors evolved to use an upright walking posture, over the knuckle dragging method used previously, our sexual engagements (no snickering there in the back; this is science) began to evolve from a posterior entry position (I said, no snickering) to a frontal, face to face position. These anthropologists suspect that male attraction for large teats (all right, knock it off!) comes from a displaced recognition of the female buttocks (that's it... see me after class!) being presented as an indication of her willingness to have sex.

And yes, I spelled teat correctly. "Tit" is a phonetic slang spelling, "breast" can apply to male or female bodies, and "mammary" is a sub-surface gland. "Knockers", "jugs", "melons", "boobs", "hooters", "bosoms", "crease creatures", "deltoid drawers", "bust", "monkey lumps", "globes", "tatas", "dodongoes", "torpedoes", "mounds", "melons", "jigglies", "stacks", "bouncers", "breasticles", and "latter lickable ladyparts", are all, equally, unacceptable.

So there. :tt2: