A couple always refer to having sex as 'putting the washing machine on' so as not to let the kids know what they are talking about. One night he says to her shall we put the washing machine on? She says no I've got a headache. Later in the night she wakes him and says the headache has gone shall we put the washing machine on now, to which he replies, its too late, I only had a small load so I did it by hand.