Have your Parents ever said anything really embarrassing about you, in front of a load of people? Or maybe one of your mate's parents said something about them, in front of you.
I remember once, when I was 15, I'd just come back from a holiday, with my mate and his family, and my mum met my mate's mum in Sainsbury's, and for some reason, my mum accidentally disclosed the fact that I'd told her that my mate's family were always arguing. Needless to say, I wasn't invited on their next holiday, the following year.
As for the lads I went to school with, some of them really did have dozy mums, who didn't seem to worry about embarrassing their sons, e.g. I remember one lad's mum telling a load of other mothers, including mine, that her son, who was 13 at the time, didn't have any pubic hair down below. Then, there was the mother who discussed her son's wet dream problem, bemoaning how she was always having to take his sheets to the launderette. Oh, and I seem to remember another of my mates' mums, telling my mum that her son had been in tears, crying over something really trivial, like the fact that they'd run out of brown sauce one dinnertime - when he was 16!