my cousin sent me this link and well the site is in vietnamese but just click on the video to play it.
http://ngoisao.net/News/Dung-cuoi/2007/09/3B9C11DA/ (http://ngoisao.net/News/Dung-cuoi/2007/09/3B9C11DA/)
That's impressive. You should try drawing some of those in school some time. Leave the penis evident for half the hour, then finish the rest when someone says something. Giggity giggity goo!
I used to draw mosquitoes with exceptionally long proboscises (resembling wangs). I'd draw the obscene part in a brown dry-erase marker and the rest in red. We had these Mira things in geometry we used for drawing symmetric stuff which were tinted red. When you looked through them, red marker was invisible.
Ah, high school was fun. :)