If you look at the name of the link you'll see it's not really work safe but very informative... no actual penii, I promise. All dildoish.
Just clink on the links on the left and right and they'll show you a little demonstration.. for all the boys out there who like boys, and all teh girls out there who like boys, and for all the boys out there who like themselves ;)
The Aztec word for avocado, ahucatl, means testicle and Aztec virgins were not allowed outside during avocado harvesting. History doesn’t record whether they were allowed to eat them.
Wow, great link! Trying out all of those techniques should provide hours of fun ;)
BTW, if you're into historical fiction at all, there's a great book called "Aztec" that's set in the time just before Columbus showed up. I thought it gave a really good picture of their society and culture (assuming the author didn't take too many liberties).