[evol-psych] Together again
- NEW SCIENTIST
September 4 1999
ABSENCE MAKES MEN'S HEARTS grow fonder, but apparently not women's.
Psychologists say this may be a strategy designed to help men outsmart an
Males of most species can never be sure that the children they help to raise
are their own. According to a 1995 study, men minimise the risk of unwittingly
caring for another man's child by producing more sperm in their ejaculate the
longer they have been away from their partner. It made no difference how long
it had been since the couple last had sex.
Todd Shackelford at Florida Atlantic University in Davie and his colleagues
suspected that a psychological mechanism might trigger the increase in sperm
production. To find the link between psychology and physiology they asked 692
American and German men and women in committed heterosexual relationships to
fill out an anonymous questionnaire.
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