We're burned by the sun, we easily dehydrate, and may at times get mild sunstroke - but yet we still choose to leave our dwellings and congregate next to large bodies of undrinkable water. We don't do too much for the most part; we lie on the sand, stand in the water, and sometimes swim or body surf.

Imagine being an alien and arriving at earth to observe our race. Assuming that (a) aliens exist, and (b) their world doesn't have the concept perfect beach weather, wouldn't our practice of spending time at the beach look kinda odd?