[listicle] 10 Animals that trade sex for favours

http://io9.com/10-animals-that-trade...ors-1673049102

Quote:

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Humans didn't invent the idea of combining sex and commerce. Plenty of animals are willing to mate, but only if the price is right. Here are 10 animals who will offer sex for reasons other than just preserving the species.

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I don't fancy my chances of trying this on with a lady about swapping some on my favours for sex other than pain hard earned cash