Via New Scientist:
Buying a lady a drink to win her favour is a trick not confined to men. Some beetle females will mate simply to quench their thirst.
The bean weevil Callosobruchus maculatus feeds on dry pulses. With a diet like this, the male’s ejaculate is a valuable water source for females. Martin Edvardsson at Uppsala University, Sweden, tested the idea that females tap into this by keeping them on dry beans with or without access to water. Females living on beans alone accepted more matings, presumably to secure the water in the seminal fluid (Animal Behaviour, DOI: 10.1016/j.anbehav.2006.07.018).
Well, whattya know? An evolutionary advantage to one of my favorite passtimes…
Happy Hump Day!
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