I would start by tickling her feet, work my my way up to her earlobes and then work my way down again from her lobes to her toes and not miss an inch of ticklish or sensitive flesh between those two parts of her anatomy. I never have liked tatoos either,didn't when I was in the Army and I never will like them but that wouldn't stop me from tickling a girl who had them unless she was one giant tatoo from the neck down.