From The BBC
It might sound like an affair, but what if your "cheating" partner was fast asleep during the act?
The phenomenon, called sleep sex, was described to doctors at a meeting in Australia.
Sleep physician Peter Buchanan, from Sydney's Royal Alfred Hospital, described this real life case.
Forgive us if we think this sounds a little specious. “It wasn’t cheating, baby, I was asleep. I thought I was humping you, not our neighbor.” Well, we’re sort of buying it. The whole Ambien fiasco made it clear that sometimes people do crazy things while ‘asleep’. This cannot be terribly dissimilar from blacking out from drugs or wine and continuing to function (be sure to check for credit card receipts). Maybe we buy into this phenomenon, but we’re drawing a line in the sand at our significant others buying gifts for and vacationing with these sleepy-time sex partners.