I used contraception, but my girlfriend is pregnant

(1)Boy, my girlfriend is pregnant
(2)But I made sure to use contraception while having sex, and the condom was never torn
(3)But why is your girlfriend pregnant
(4)Doctor, let me tell you a story
(5)There was a hunter This hunter carried a gun everywhere
(6)One day, I mistook the umbrella for a gun and left with it
(7)Then, suddenly, a lion appeared somewhere
(8)The hunter wasn’t afraid
(9)Because the hunter was thinking of the umbrella as a gun
(10)And, as always, he pointed a gun at him
(11)The umbrella opened! But the lion was dead!
(12)What are you talking about? No one else shot the lion
(13)Doctor, you got it
(14)Nurse, please call the next patient