As we found out earlier this year when an orangutan in South Carolina adopted three tiger cubs, the animals have pretty impressive parental instincts.
Rajang, an orangutan at Britain's Colchester Zoo, recently confirmed this when he was filmed kissing a pregnant woman's stomach through the glass of his enclosure.
The woman's partner tries the same thing moments later in the clip, but has less luck. "I'll put my belly there, and see if he does the same thing," says cameraman Jay Clarke, but the orangutan just isn't interested.