Bill the Duck

A duck walks into a drugstore and says to the pharmacist:

- Gimme a chap stick.

The pharmacist asks the duck:

- Will that be cash or charge?

The duck replies:

- Just put it on my bill.

The next day, the duck goes back to the drugstore and says to the clerk:

- Give me a box of condoms.

The clerk says:

- Do you want me to also put them on your bill?

The duck says:

- Hell no, I'm not that kind of duck!