Why do people like to vacation to the beach so often?

Are you talking about a small pond or something?

I've always lived within close proximity to some sort of water, be it a reservoir, lake, river or ocean (Pacific and Atlantic).  I simply cannot imagine not being near water.

What type of bodily waste do you imagine you're swimming in, and what type of body of water are you thinking of?  Living at the ocean, it's marine biological life that surrounds those who delve in.