One thing you can say about
Mickey Spillane's famed detective Mike Hammer: he sure does grin a lot. I would say it is the main thing he does, aside from shooting people in the stomach. Here are three of the literally billions of examples from VENGEANCE IS MINE! (
exclamation point Spillane's): 1) My grin split into a smile and that into a laugh. 2) I forced a grin through the frown. 3) "You don't have much faith in yourself, kid," I grinned.