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The findings were published online today Feb. In some insect and spider species, sex can be a deadly roll of the dice for males, carrying the possibility that their female partners may suddenly identify them as a convenient postcoital snack. In another spider species, Anderson and her colleagues explained in the study, when a female consumes the male after mating, it leads to more offspring and increases the little spiders' weight and chances for survival. Tying up your lover is one way to introduce a little excitement to the bedroom. But the unprotected males were also much more likely to be eaten afterward, the researchers reported. Anderson, a behavioral ecologist at the University of Nebraska-Lincoln, told Live Science in an email that to a just-fertilized female with eggs to nourish, her mate's immediate value transforms from sex partner into "resources for her developing offspring" — like a Happy Meal with legs. But for male nursery-web spiders, bondage during mating can be a matter of life and death.

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