Three Viagra Pills

A guy goes to his doctor and says:

- Doc, I have a problem. My girlfriend is sleeping over this Friday, my ex-wife is sleeping over this Saturday and my wife is coming home Sunday. I need 3 Viagra pills to satisfy them all.

The doctor says:

- You know 3 Viagra pills 3 nights in a row is pretty dangerous for any man. I will give them to you on the condition that you return to my office on Monday so that I can check you out.

The man says:

- You have a deal Doc.

Monday morning the man returns with his arm in a sling.

The doctor asks:

- What happened?

The man answered:

- Nobody showed up!