I answered yes, but I don't think "sunbathe" is a fully-accurate description of what we were doing. I was backpacking with a (now) ex-girlfriend in the early 90s. We were all by ourselves, deep inside a wilderness area. We found a natural clearing a couple of hundred yards off the trail, where we set up our tents in the middle of the afternoon on a sunny summer day.
We decided now was a good time to take those tabs of "recreational substance" we'd brought with us. So, for the next several hours, we had a really nice time. It was warm, and taking off our clothes just seemed like a really good idea. It was a truly awesome day.