spitthe dog....I had a mate, many years ago who had quite a unique technique.Sitting in the back of a car with a new date and getting nowhere, he would unzip himself and take out his penis. Now the reaction would either be one of acceptance or one of shock horror and disgust and if it was the latter, he would burst into tears saying "I am terribly sorry, I don´t know what came over me"
He told me that it got a positive result in the majority of cases.