Once I had kids I gave up swearing. I figured they would hear enough bad language at school without having to listen to me curse at home. Mostly I don't miss it, as English is a rich and expressive language even without its four letter words. Also, too many people mistakenly believe adding swear words automatically makes anything they say funnier or more colorful. In fact, using profanity to its full comedic effect is an art (see the writings of P.J. O' Rourke or The Onion).