After years of extensive brain function thinking, I think I have determined that bats are practically identical to human prostitues. Think about it, both bats and prostitutes sleep during the day and "feed" at night. Not to mention the fact that the average lifespan of a bat is approximately twenty years and if you compare bat years versus human prostitute years that sounds about right. I also believe that many humans are direct descendants of camels. While I have no direct evidence to back this claim, my thesis paper entitle "Humans And Camels And Why We Both Yearn For Humps" should be published by the end of the year.