Reading a bad paper assigned by your professor is like going through the second stunt in Fear Factor: it totally sucks and you've got to take it all.

Curiosity killed the cat [ subscription required ].

Psychological and Physiological Adaptations to Sperm Competition in Humans.
Shackelford, Todd K.; Pound, Nicholas; Goetz, Aaron T.

Abstract:
Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial, however. The authors review critically the evidence that human males and females have psychological, behavioral, and physiological adaptations that evolved in response to selection pressures associated with sperm competition. The authors consider, using evidence from contemporary societies, whether sperm competition is likely to have been a significant adaptive problem for ancestral humans and examine the evidence suggesting that human males have physiological and psychological mechanisms that allow for "prudent" sperm allocation in response to variations in the risk of sperm competition. (PsycINFO Database Record (c) 2005 APA, all rights reserved)