One has a smoking problem, one is an alcholic and one is gay but wants to change.

The docter puts a curse on them that if any of them indulge their habits again they will die.

Two days later the alcholic dies because he gave in and had to drink.

The next day the gay guy and the smoker are walking down the street together. The smoker sees a cigarette on the ground and stops to stare at it.

The gay guy looked at him and said "If you bend over and pick that up we are both fucked"