Tiki Humor

I was teaching my chemistry class about elements on the periodic table, mentioning that since silicon and carbon have similar properties, science-fiction writers theorize about silicon-based life forms on other planets. “But,” I stressed, “there is no evidence that silicon-based life has existed here on Earth.” From the back of the room, a voice flashed back, “Have you never seen porn?”
– Mon Jan 26 « Lefturn’s Funny Shit