All You Zombies by Robert Heinlein

Ages since I read any science fiction stuff. Came upon this short story while wiki'ing Heinlein upon re-watching Starship Troopers recently. Plus, I guess it also popped up on some libertarian wires that flood my facebook feed.

After all, what's $1.25 paid to amazon for a story about a man who realized he is both his own father and his own mother? Well, go figure.