Both are pointing at it. You see it, front at the bottom, under the O, now it’s clearly visible in the frame…

"Both are pointing at it. You see it, front at the bottom, under the O, now it's clearly visible in the frame, what you refer to as the central tattoo seems to be a confused visual illusion among the normal anatomical folds at the convergence. The lower part of the tattoo, with those thin lines that gently descend toward the central convergence, gives the impression that there is a “space” or “something missing” underneath… like a groove when you look at it closely:"