 What is not increasing as time goes on?
It is everywhere, impossible to avoid or tune out. Twenty years ago, he would have said, "We're in big trouble." Societal tolerance of profanity requires us to increase our dosage as time goes on. There are a couple of credible candidates: The four-letter word for "vagina" remains off-limits in polite conversation (although that has more to do with feminism than with profanity), and the slang expression for those who engage in oral sex with males is not yet acceptable by the standards of office-meeting etiquette. When almost anything can be said in public, profanity ceases to exist in any meaningful way at all. It does not serve those purposes any more.
 the amount of words considered taboo
 the amount of people allowed to swear without punishment  the amount of words considered taboo  the amount of profanity heard  societal tolerance