Groping Or Chikan What Is The Difference Between Massaging And Groping?

What is the difference between massaging and groping? - groping or chikan

My friend) (of a girl and I'm always a little more than friends. We have kissed before and during the weekend, I began to massage his chest (he was still dressed) by friction. She said nothing she wanted, but we entered into a long discussion about the difference between massage and grope. What is the difference?