Joe and his wife Lisa were in the shower and the door rang. Joe:"Go and open , please!" At the door only draped by a towel Lisa met their frend Bob who said: "If you let your towel slip, I´ll give you 1000 USD. So she did and got the 1000. Back in the shower Joe asked;"Who was it?" Lisa;"Bob!" Joe;"Did he give the 1000 USD I borrowed hin yesterday!" Teaching strategy; "Always tell your partner about finances, otherwise some misstakes can happen!"