Adjust your gangbang strategies accordingly

Research on various animals shows that, when multiple males mate with a female one after another, the male who goes last has the best chance of impregnating the female.

Males ejaculate hundreds of millions of sperm into the female reproductive tract, but most don’t make it to the egg for fertilization. In mammals, just .001 percent of the ejaculated sperm hit the fertilization target.

"We know that the reproductive tract in females can be a nasty place for sperm," Hodgson told LiveScience. The acidity can kill many sperm, and scientists think some females’ immune systems attack sperm as a “foreign object.”

The seminal fluid in a male’s ejaculate helps to buffer the acidity, creating more viable conditions for sperm. By waiting in line, males could exploit the ejaculate from other males, giving their sperm a cushy ride into the female’s uterus to fertilize eggs.

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The finding seems to apply to any organism in which females mate with multiple partners in rapid succession, out in the open where others can watch. The mating needs to be relatively rapid for the physical effects of a prior male’s sperm to remain.

So remember, all you male readers out there: if you're sharing the company of a woman and several of your male friends, be sure to jump in line first. The courts can't make you pay child support payments if the kid's not genetically yours!