[jacobolus]

The oldest versions I've heard went something like “Welcome to the internet, where the men are men, the women are men, and the children are FBI agents.”

Example from 2001: http://www.bash.org/?2832

Pretty sure the line goes back further than that though.

My guess is that it’s a parody of A Prairie Home Companion’s line about “Lake Wobegone, where all the women are strong, all the men are good looking, and all the children are above average.” Though that might itself be playing on some earlier such line?

[danohuiginn]

I think of the hitch-hikers guide to the galaxy (from the 70s?): "Where men are real men, women are real women and small furry creatures from Alpha Centori are real small furry creatures from Alpha Centori."

Which is presumably itself a parody, I'd guess of some standard line from a Western. But I couldn't pin it down to exactly where.