An interesting thought... I got this from a Calvin and Hobbes comic.
Who thought of the idea to milk animals?
In Calvin and Hobbes comic, Calvin is talking to Hobbes, asking
the question "Where did we get the idea of milk? Did some on just "I think
I'll pull on this pink the thing and drink what comes out." and first got
milk. I mean, what if it was not a cow... A human for instance? Humans
have nipples. Especially our obese population. (no offense, but thats what
some of my friends tell me)