http://www.sciencedaily.com/releases/2008/04/080410153643.htm

This recent study shows reveals that humans do like the birds and bees when they make like the birds and bees.  That is to say, there is tremendous evidence in the animal kingdom of the exchange of sex for resources and vice versa.  Humans, it would seem, not immune to this sort of behaviour despite any influences of class or caste. 

In my study of biology, I attended a class at 8am in the dead of winter broadly titled “Animals”.  The class lacked anything wild despite its title and it was an exercise just to keep my eyes open.  Don’t get me wrong, our Prof was a nice enough guy, it’s just I don’t function at that hour.

One day though our professor Kenneth Davey took a tangent into the mating rituals of the fly family Empidae.  He showed a progression in the evolution of nuptial gifts — the process of exchanging resources for sex — across several members of the family in the following progression.

1) The male mates with the female and is eaten by the female.

2) The male brings a food gift to the female hoping that while she’s eating the gift he can do the deed and escape in a hurry.  They mate, she eats the food he brought her followed by him for dessert. 

3) The male brings a food gift wrapped in a grass wrapping.  While she busily unwraps the grass wrapping, he’s able to ‘wham bam and thank you maam’ before she manages to open the package.  He escapes and she at least is able to enjoy her food.

4) The male brings a package to the female.  As she unwraps it he, as before, completes the deed and escapes.  She finally unwraps the package only to discover that it’s empty.

I have too many comments to offer about this tale, so instead I’ll offer none.  I’d imagine your assessment of this story will be highly dependent on your perspective.