Well I won't tan in the nude for a number of reasons:
1). I heard nude tanning or being out in the sun without your top-- turns your areolas* dark (in addition to pregnancy). I want to keep mine pink for as long as possible.
2). I'm so fair-skinned that when I "am" tan, folks don't believe I am. So I keep tan lines to prove I'm tan.
3). (secret)
*Side note....I hate the internet. Can't tell which is the correct way to spell anything because if you look it up all the ways you want to spell it, its on the net with definitions for all ways and thus, you don't know which is right. In the case of AREOLAS....there was medical information under: areola and...aereola. I chose areola since Merriam-Webster spelled it that way. --->see??