What's the one kind of boat that can never, ever sink? A friendship.

The joke from the US TV show Friends, a sitcom about the relationships between a group of New York City buddies, is employed in a series of comics that have recently gone viral online in China. But in the new version, the "friend ship" is extremely vulnerable.

In the first comic strip, two penguins sit on either side of a boat. Since one of them has successfully lost weight, the boat overturns as a result of the imbalance, and the friendship breaks up out of jealousy.