CNN wants to give you nightmares, so they list Five disorders that make sleep scary. Here's #3:

It's embarrassing enough to be told that you snore or mumble in your sleep, but imagine being told that you take off all your clothes, moan in ecstasy, and sometimes even pleasure yourself -- all without any memory of doing so. This is what happens with Sexsomnia.

The scariest part is that they only list four... the acute hypochondria caused by reading article itself is the fifth! Boo!