I have two DD's both in different classes in year 6.
Last week, they had to watch the sex education video (periods, puberty etc etc)
One of my daughters teachers let the whole class have a laugh and giggle, generally heckle etc and there was much ribbing between the boys and the girls.
My other daughters teacher told them they were not allowed to laugh and she stood facing the whole class whilst the video was being played. My daughter described the bit where you get to see an infrared image of a male errection (I remember that when I was younger too -bloody hilarious) and she said it was AGONY not being able to laugh.
What worries me slightly is that she tends to find these things a bit embarrassing anyway and I don't think her teachers attitude helped.
Cow.