After posting the meat quote, I looked into it a bit more, and found that it actually originated in a Flanders and Swann song.
Flanders and Swann were a comic duo who specialized in clever and witty humorous songs, somewhat along the same lines as Tom Lehrer. The quote itself is from a song called The Reluctant Cannibal, about a cannibal who doesn't want to eat people. His father says,
If the Jou-Jou had meant us not to eat people,
He wouldn't have made us of meat.
I've only heard a Flanders and Swann song accidentally (A Song of Patriotic Prejudice as part of a web-cast of Napa 29 Community Radio). Long live the variety of community radio stations and the availability of them over the web.