My phobia of dentists was caused when i was a nipper; my gran often looked after me when mum went to work. One day gran had to see her dentist, and there being no-one else to look after me, I had to go along too. So there I was, sitting in the corner of the dentist's surgery watching the proceedings intently....dentist told gran to "open wide" and then put his hand in her mouth and removed her full set of dentures..... I had no idea what dentures were. The locals were then entertained by the dentist running down the street in his white coat trying to catch a screaming 4 year old running for his life.