Why do we have......?

A camel decided to educate his son who he suspected was getting a little inquisitive.

"Why do we have two humps?" asked the son. "That's so that we can go for days and weeks without water. We can store it in the humps."

"Why do we have very long eye lashes?" "That," he was told, "is to protect the eyes from the sand in a sand storm."

"And why do we have bulb like feet?" "That is so that we can travel twice as fast through the desert."

"Dad," asked the young camel, "What the hell are we doing in this zoo?"