The one about the man and the homeless bum

The homeless bum asks the man for $2,

HM) May I have $2 please, your genorosity would never be forgotten.

Man) Would you use it for booze?

HM) no, I swear I won't

Man) Would you spend it gambling?

HM) No, I swear.

Man) Will you come home with me? I want my wife to see what happens to a man who doesn't gamble and drink.