We are riding our bikes and out in the sun quit a bit and I thought I would pass this on. I go to the dermatologist every 6 months and he usually finds something on me. This past visit he found some pre cancer and caught it in time. I worked outside all my life, but he found the cancer in the middle of my chest, where it's not exposed that much. So if you guys are getting up there in age or going to nudist colonies you may want to add the dermatologist to your check ups.