I have an ongoing piece that runs from my right shoulder blade down my side almost to the waist. It's a black & gray scrollwork with a lily at the top, I love it and eventually it'll go down my hip, leg & ankle (when I have $ to blow, lol). It's gorgeous and everytime I go out in public with it exposed I get compliments. I waited until I was over 30 & separated because my ex hated tats. I picked a good location for weight gain/loss & I can totally cover it if needed.
I do have an exposed eyebrow piercing but most people don't even notice it with the jewelry in, it's subtle.
Someone mentioned tattooing over scars. I have a lower back surgery scar and my surgeon said it was fine to tattoo over it after a year, my tattoo guy agreed. I can't bring myself to do it though, I had enough pain in that location to do it again but the zipper idea is funny, my ex said I should do that too.
I wish I could take a good pic of my tat by myself but it's a little big for mirror self photos!