If you're talkin' 'bout me, I only did it about once in the spring, to get ½" of callus, dead skin & other nastiness off, and it was only $10 at the beauty college. Easier than DIY, and it was fun to joke with them about what colour lacquer I wanted (finally settling on clear). But, for awhile a few years ago there *was* a disturbing trend for guys to paint their nails, hands and/or feet. Some rock star do their fingernails, e.g. Alexi Laiho of Children of Bodom:
YES, the old guy with all the 'outdated references' knows about CoB.