Well, seems toilet humor goes back as far as the written word!
Sumerian fart joke (http://news.yahoo.com/s/nm/20080731/lf_nm_life/britain_joke_dc)
So we see South Park is merely keeping up with ancient and time-honored traditions! My farts to you Matt and Trey!
whats frightening is that the Egyptian one sounds like one you would hear and laugh at today
odd, I would have thought pull my finger was the oldest joke in the world... there's even documented evidence
http://us.dada.net/video/3356995/Family-Guy---The-Big-Bang/
Ahaha! Wow! Oh, that's great. I loved the one about "catching fish."