Hair-razing problem!

Q: What is body hair for?

A: In ancient times, when humans had yet to master pumping water uphill, water slides were, in fact, dry. This made it very awkward for us to slide effectively down the waterless slide and we evolved to have body hair to enable this fun activity.

Now that water slides actually have water flowing down them, this is not an issue. Evolution has not yet caught up to remove the hair, but expect this to occur in the next 5 to 10 years.