Perhaps they think the Blue Collar worker looks tough to them.
I know I work as a lumberjack but most of those men are God fearing folks who don't like cussing as it is a waste the time and don't need the filth in their minds from doing so.
(2) A retort one uses when they think the other person is being twisted in some fashion
Female: You're kind of cute.
Guy: Y'think so? Ya wanna feel my "cute?"
Female: PERV !
is a Quick Way to Say PERVERT.
As In, "Get Your Hands Out of Your Pants, You PERV."