Animal sex -- Did you know that a banana slug's penis is typically as long as its body ... and located on the side of its head? If there is one thing to be learned from the Museum of Sex's new exhibit, "The Sex Lives of Animals," it's that when it comes to animal sex, there are very few rules -- animals switch genders, some males give birth, some females have penises and lifelong monogamy is very rare.

And even if you're not interested in reading all the plaques, for the New York museum's $14.50 entrance fee, you can still observe more animal humping than at the dog park on Sunday. While some animal sexual behaviors may seem surprising, others will appear all too familiar. For instance, male macaques will forfeit their snacks in exchange for viewing photographs of the genitalia and posteriors of female macaques. At least that's one way humans are superior -- we can have our Cheez Doodles and our porn.

Get a sneak peek into the exhibit below.


Sex Lives of Animals

    Velvet Monkeys are most easily recognized for their bright turquoise scrotum and red penis. The color of he scrotum lightens if the individual's social rank drops.


    Photo Courtesy of Ron Magill

    The female spotted hyena has a penis-like appendage complete with erectile tissue. Both the urethra and the birth canal are buried in the center of this structure, and the female spotted hyena gives birth by discharging a baby hyena from the end of her "penis."


    Photo Courtesy of Ron Magill

    Elephants engaged in mounting behavior. Female elephants have even been observed masturbating one another in captivity using their trunks.


    Photo Courtesy of Ron Magill

    The genitalia of the female bonobo is one of the most conspicuous parts of her anatomy. Genital engorgement, typically an indicator of estrus in other primates, is present at all times in female bonobos. This physical attribute is linked to the high frequency of sexual encounters, independent of fertile periods.


    Photo Courtesy of Ron Magill

    Masturbation has been widely documented in primates. Many have been observed using natural materials such as stone, roots, and fruit as well as objects found in captivity to stimulate their genitalia.


    Photo Courtesy of Luka Essenko

    Animals, like people, have non-genital erogenous zones. Bonobos manipulate each other's nipples for pleasure.

    Photo Courtesy of Dr. Amy Parish

    Penguins exhibitions mounting behavior.


    Photo Courtesy of Ron Magill

    Occasionally, younger males will mount older bucks, who can be differentiated by the size of their antlers. In some cases, group mounting is exhibited.


    Artist: Rune Olsen / Photo: Jason Mandella

    G-G Rubbing Bonobo Sculpture

    Artist: Rune Olsen / Photo: Jason Mandella

    In an attempt to enhance libibo and encourage reproduction, captive males pandas have been shown "panda porn" or videos of other pandas mating.

    Artist: Rune Olsen / Photo: Jason Mandella