Het warning!
But this is Farscape, so I hope you'll forgive me.
"Scientist, Astronaut, and Nymphomaniac: The nine lives of John Crichton" by feldman
is an Out of Their Minds AU. John and Aeryn have switched bodies, and this is probably one of the hottest fics I ever read. And that's saying something, seeing that this is het, and I'm a slasher at