"The male approaches with his thumbs (like the Fonz) and mounts the female (like the Fonz.)"

Male bats create tents by biting leaves until they fall into shape. These provide shelter and double as harems, each housing several females who the male mates with. Fruit bat sex goes like this: the female approaches and sniffs the male, and both partners start to lick one another. The male makes approaches with his thumbs (like the Fonz) and mounts the female (like the Fonz). Sex itself is the typical rhythmic thrusting that we're used to, and afterwards, the male licks his own penis for several seconds.

But Tan also found that female bat will often bend down to lick the shaft of her mate's penis during sex itself. This behaviour happened on 70% of the videos, making it the only known example of regular fellatio in a non-human animal.