Years ago, when I was in my late teens, I was working outside where I knew no one would see me, decided to try on a bikini, I ended up getting badly sunburnt, with obvious "tanlines", spent that night in agony, but, couldn't say a word to anyone, couldn't take my top off for the rest of the summer in case anyone saw my tanlines. Took ages for them to go, while it was initially thrilling to have tanlines, it wasn't worth it and definitely learnt my lesson! Despite all that I do like how tanlines look when properly done!