I once nearly had the unions on my back when, many years ago when i worked at the water board, I changed the plug on my electric typewriter..why wait for an electrician to come, fill in all sorts of forms, go away, come back with a plug changing person, when I could do it myself in five minutes? Didn't help that I was a 19 year old girl of course ;)
Two things my dad taught me, how to change a plug and how to change a tyre.