On the mythical "orgasmic birth."
No, neither of us run a "family-friendly" blog. Why do you ask?
UPDATE. Christina in the comments helpfully provides references to orgasmic-birth stories. I link, you decide!
http://www.unassistedchildbirth.com/sensual/orgasmic.html
http://www.youtube.com/watch?v=h5bm9-B6Ec4&feature=related
http://www.mothering.com/discussions/showthread.php?t=1218320
UPDATE AGAIN. A poetic response from Bob the Ape .