Joke: Doctor: Your girlfriend Is pregnant. Guy: But doctor that can't be right. We use condoms everytime we have sex. Doctor: Well, the test result would suggest otherwise. Maybe the condom broke? Guy: No I'm sure it didn't. Doctor: Alright then. Let me tell you a story... A guy was wandering in the forest where he encountered a tiger. The tiger looked really ferocious and the guy knew that he was doomed. Cornered, the guy then points his umbrella's tip at the tiger and shouts BANG at the tiger. The tiger died. Guy: That can't be right. Someone else must have shot the tiger. Doctor: Exactly.