The couples had a code word “Washing machine” as signal for sxx .As the couple had two children who couldn’t be judged whether they’re sleeping or not. One day, the husband became hoorny at night, so he signalled “Washing machine”. But his wife was in head ache..So, she told she couldn’t. After some time, feeling pity for her husband the wife signalled “Washing machine”. The husband replied “I have washed it with my hands”