According to a recent study by Trine Bilde of the University of Aarhus in Denmark, the male spiders of the species Pisaura mirabilis who play dead are allowed to have sex longer than ones that do not. All of the male spiders held bribes of food in their mouths but the ones who remained flat and motionless (as the females latched onto the food) were the most successful. The prolonged copulation allows more eggs to be fertilized. Males play possum for sex while females play possum not to have sex: Mars versus Venus?
Cf. http://www.breitbart.com/article.php?id=080227181655.7ypqks33&show_article=1
Carpe Diem 