The "Coolidge Effect": Renewed (and even limitless) sexual arousal when confronted with new pussy isn't just in your head

http://en.wikipedia.org/wiki/Coolidge_effect#Empirical_evidence

The "Refractory Period" is when you are unable to get a boner immediately after orgasm for a set time (which ranges depending on your age, genetics, etc).

But there's a quirk:

In biology and psychology, the Coolidge effect is a phenomenon seen in mammalian species whereby males (and to a lesser extent females) exhibit renewed sexual interest if introduced to new receptive sexual partners, even after refusing sex from prior but still available sexual partners.

Translation: You were designed to spin plates.

...this post-ejaculatory refractory period is reduced or eliminated if a novel female becomes available.This effect is cited by evolutionary biologists as evidence that males are more likely to be re-aroused by a novel sexual partner (and so desire sex with a greater number and variety of partners than females).

It's your biological imperative. Monogamy is a social construction.

And if you're wondering if women experience this:

Lester and Gorzalka developed a model to determine whether or not the Coolidge effect also occurs in females. Their experiment, which used hamsters instead of rats, found that it does occur to a lesser degree in females.

Well obviously you can't argue with those results