We have a male and female teacher at our school who have been dating for a while. The children don't know this (supposedly).
The other day, Kate, aged 9, said to her teacher 'I am so fed up! Those children over there keep talking about sex'.
'Oh', said the teacher, 'what are they saying about it?'
Kate (airily) 'Well, apparently Mr Jones and Miss Brown are having it'.
Honey