A mammoth problem

Here's a story in the BBC about mammoth poo and how it provides clues as to why they became extinct. Well, it doesn't actually say why they became extinct, it just says that a meteor can be ruled out.

The thing is, I know the answer. I was already aware of elephants having certain... erm... needs, as this video shows, and some time ago it led me to this inescapable conclusion: the mammoth died out because it didn't reproduce. Basically the hairy blighters spent too much time playing with themselves and not actually having sex.

Then some bright spark invents the spear and lo! Humans kill off the mammoths, who are distracted by their own masturbatory antics, and yet another species dies out.