“3. Sex. Sex is valuable. It reminds your body that you are alive and why you are here, scientifically or religiously speaking, to procreate. Once you stop orgasming, your body thinks the show has ended, but orgasms create hormones that make you feel good and look younger. The orgasm can be alone or with a partner, but it should be in a positive safe environment.
…”— 14 Golden Tips for Beating the Freelancer Blues
“In Scandinavian folklore, a mara is a supernatural creature which is believed to torment people in their sleep by sitting on their chest and “riding” them, thus causing nightmares.”—from Answers.com