I'm naturally very clean-spoken (ahem) which I attribute to the clip round the ear I got from my mother when I came home from school and said "crap"!!
WARNING:typical RtS thread creep follows
Recently we went to the theatre with a friend of long-standing and stopped off on the way home for a Chinese takeaway. I put it in the car boot (trunk) and my wife slammed the lid- a bit prematurely, catching my head! Our friend said she never realised I had such an extensive, rich and colourful vocabulary and my ever-loving told me not to make such a fuss and not to bleed all over the upholstery.
It is much more effective when saved up for special occasions rather than used as if there were only one adjective.