Three nurses all decided to play a joke on the doctor...

Three nurses all decided to play a joke on the doctor they worked for. Later in the day, they all got together on break and discussed what they had done to the doctor. The first nurse said, "I put cotton in his stethoscope so he couldn't hear. The second nurse said, "Well, I did worse than that. I poked holes in all his condoms. The third nurse fainted.