Pretty much anything goes with me.. I have a totally sick sense of humour which, like Grego is a side effect of working in tragic situations. Most clinical staff in the NHS, docs, nurses, midwives etc have the ability to laugh at tragedy because if we didn't, we'd cry. I have also found that ambulance personnel, firemen and police officers have a similar sort of humour.
As far as I'm concerned, the more politically incorrect the joke, the better it is.... but ultimately, it's how you tell em..

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Never put off until tomorrow what you can avoid altogether.
The views expressed here are my own and not necessarily those of my family, friends, employer, this site, my neighbours, hairdresser, dentist, GP, next door's dog or anyone else who knows me..