I love tan lines!!! Of course I do!!
I get kind of bored just laying there in the sun doing nothing after about fifteen minutes or so. So usually, my version of sun bathing is desert walking, or mountain hiking, or just going for a walk. The further I am out of the city, the less clothes I have to wear.
This summer, if I do make it to Dandong, I plan to jump the wall and do some nude sun bathing in North Korea for shits and giggles. Last time I was there... we had a snow ball fight over the wall.