I'm interested in suntanning as a type of homesis. We seem to live in a society that is afraid of the sun. Everyone is fearful of getting skin cancer, so they lather up with SPF-30, don their sun hats and sunglasses, and stay out of the midday sun. But did we really evolve to hide from the sun? I like to bake for hours in the sun and get a deep rich tan. I think if you are in the sun a lot, you build up a resistance to UV radiation as your melanin builds up. I think the people who get skin cancer might be the ones who are rarely in the sun and then try to get a quick tan and get a burn. But if you spend a lot of time outdoors and not just on summer vacation or spring break, you build up a resistance. Of course, there are probably folks with sensitive skin, like redheads, who have to be careful. But I think as long as you build up gradually you might be OK. I'd be interested to see if there are any studies on this. I don't trust all this phobia about skin cancer, it seems to have come up in just the last 20 or 30 years, like all the other health fears that seem to get promoted.