Female cheetahs and lions lick their partners' genitals as a courtship ritual.
The observer, Kees Moelikersuggested that "when one died the other one just went for shemps sex and didn't get any negative feedback—well, didn't get any feedback.
Bonobos have been observed to transition from a simple demonstration of affection to non-penetrative genital stimulation.
Animal homosexuality and natural diversity.
In fact, the researchers go into considerable detail—suffice it to say that fellatio looks in bears much like it does in humans, tends to take a few minutes, and happens several times a day, reports Discover.
Scientists analyzed a colony of about Indian flying foxes Pteropus giganteus roosting in a single fig tree in southern India, near the village of Nallachampatti.
Expressions of affection are displayed in the animal kingdom as well.
As unusual as the behavior may be in bears, they are not alone in the animal kingdom: