My personal issue with tan lines is the traditional "farmer's tan" from wearing tee shirts all summer and then putting on a sleeveless dress. My daughter pointed out once that I had tan lines on my legs because I wear sweat socks and cut above the shorts which has a tanned area between two white areas of the legs. That necessitates wearing hosiery. I wouldn't want to try avoiding situations if I had tanned (for me, actually burn) wearing a bikini top or bra.