Are we wearing out obscenities?
"Profanity sinks deep emotional roots in our brains. When words develop duelling meanings, the bad stuff almost always wins out.
"In short, if English should lose its surprisingly small profane vocabulary set through overusage, we would be forced to invent new obscenities. That would be no easy task, given the polished perfection of what biology, time and chance has already bequeathed us."