Dear Dr. I am right handed but when i clapse my hand my left thumb on top. What does this mean?! Am aware of - Answered by a verified Mental Health Professional. An article from Handguns magazine on how to The Combat Grip by because wrapping the left thumb over the right opens up a gap between the heel. Oct 21, · Even though I am left handed, my right thumb is on top, and this is the way every girl I've ever held hands with also did it. I assumed everyone did.