Because we’ve turned dogs, who are all the same species, into animals that definitely don’t look like they should want to have sex with each other, they also provide a fine example of just how. Others have reported fellatio‐like activities in many mammal animals, such as bats, macaques, cheetahs, lemurs, hyenas, lions, dolphins, and bonobos (maruthupandian & marimuthu, 2013 It is often assumed that animals do not have sex for pleasure, or alternatively that humans, pigs, bonobos (and perhaps dolphins and one or two more species of primates) are the only species that do.
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Oral sex is surprisingly rare in the animal kingdom
Humans do it, of course
As do bonobos, our close relatives The discovery suggests there may be a biological advantage to. 9 for example, outside of humans, do other species of animals engage in oral sex, or any oral stimulation of others' genitals purely for pleasure, not any cleansing habits, etc.