Years and years ago, somewhere in the middle ages, LOL (as I am that old) in my career as a RN, I worked in an operating room. A woman came in for back surgery and as we turned her over, I saw butterflies tatooted on her gluteus maximus, (maximii?) both cheeks. I was fascinated by this whatever the reason and, whatever my fantasy was at the time so I went out and got one something like it--only one side though. For years and years, no one knew my secret, except for my husband. I am far far ahead of these younguns today- so there-further, I have the advantage of having an identifying mark in case I can't find my way home one of these days