It's more the farmer in me rather than the gentleman. I almost always have a folded up blue shop rag in one of my pockets. Usually for grease or dirt. Works well for snot also. I don't see the need for a hanky. They make these cute little boxes of kleenex that fit in my truck perfectly. If I blow my nose in something, it ain't going back in my pocket.
"The Ballpark burgers were free, why not eat them?" - Wabi-
