random joke - kayak

An Eskimo went out in his kayak to catch a walrus. As it was even colder than usual and because he was young and inexperienced, he built a small fire in his kayak for warmth. Unfortunately, the fire spread, and he was forced to abandon his kayak and swim to shore. 

This shows that you can't have your kayak and heat it too. 

Nanook of the North - Walrus Hunt

Samson Og Sally - Hvalrossangen (1984)

Not a joke: walrus is garbled Norse for "whale-horse", because Vikings thought it looked like a cross between and a horse.