I went to an all-boys school, so the poor female teacher got inundated with 'whats the most embarrassing question we can ask' attempts in the 'anonymous questions' pot.
She spent a good 20 minutes talking about multiple orgasms.
What? Wait, John Cleese showed us that you guys get an actual demonstration by the teacher. Crap, all these years I thought I was missing out...
Well, this particular teacher gave at least some of the pupils a practical demonstration, involving herself and another languages teacher and some unfortunate mix-up on classroom booking... but that's another story
