Four Monkeys In A Tree

There were 4 monkeys in a tree.

Why did the first monkey fall out of the tree?
→ It died.

Why did the second monkey fall out of the tree?
→ It was tied on to the first monkey.

Why did the third monkey fall out of the tree?
→ It got hit by the first two.

Why did the fourth monkey fall out of the tree?
→ Peer pressure.