Doctor, my girlfriend is pregnant

Guy: Doctor, my girlfriend is pregnant

Guy: Doctor, my girlfriend is pregnant but we always use protection and the rubber has never broken.

How is this possible?

Doctor: let me tell you a story.

There was once a hunter who always carried a gun wherever he went.

One day he took out his umbrella instead of his gun and went out.

A lion suddenly jumped in front of him.

In order to scare the lion the hunter used the umbrella like a gun and shot the lion, then it died.

Guy: Nonsense!!

Someone else must have shot the lion.

Doctor: Good, you understand the story.

Next patient please…