WATCH: Orangutan kisses expectant-mother's belly

(FOX 32 News) - An orangutan at Britain’s Colchester Zoo is touching the hearts of millions after bonding with an expectant mother and her partner—without even leaving his enclosure!

A recent video posted on YouTube shows a heavily pregnant Maisie Knight as she approaches the habitat of 47-year old Rajang, who is described one of the zoo’s most famous and beloved residents.

When Knight’s belly nears the cage, we see Rajang start to softly rub the glass. The primate continues to lean in and gently kiss the belly of the mom-to-be—and appears increasingly fixated on Knight’s generous baby-bump.

The couple says their hearts were touched by Rajang’s actions and plan to introduce him to their son when he is old enough.

Click play above to watch the video.