What is it with bees and pools?

I wish somebody would please explain to me why it is that I have literally hundreds of honey bees at my pool every day?  We have a beekeeper about 1/4 of a mile from our house and apparently their favorite watering hole is our pool.  I've heard that its the chlorine.  At first, the kids were terrified of being stung.  However, after explaining that honey bees are generally very unlikely to sting unless threatened, they've gotten used to them.  Haley even goes so far as to let them land on her hand!  Their favorite landing spot is my float.  You can generally find around 25 bees on it at any given time.

Having them so close and in such great numbers does allow us to study them.  We have enjoyed many days sitting really still in the pool watching a bee slurp up pool water.  Unfortunately, some of the bees fall in and drown.  I do my best to rescue as many as I can, but inevitably I miss a few.  Why all this talk of bees...maybe because we haven't done much else of interest over the past few days.  Here's a closeup of one of our "pool bees".  Cool huh?

P.S.  Haley says to be sure to look for the hair on her eyeball.