A guy and his gf had been dating for a year and decided to get married. His gf was perfect. The only problem was his gf's younger sister. The sister was 20, hot, and wore skanky clothes. She was always hitting on him. One day she called and asked him to come over. She was alone when he arrived. She whispered that the wedding was soon and she had a strong desire for him that she couldn't overcome. She told him that she had to have him just once before he got married to her sister. She stripped then walked up the stairs. He was frozen in shock as he watched her. He stared for a moment then turned and went to the front door. He opened it stepped out of the house and walked straight to his car. Her father was right there. With tears in his eyes he hugged his soon-to-be son-in-law and said We are very happy that you have passed our test. We couldn't ask for a better man for our daughter. Welcome to the family.

The moral of this story is: Always keep your condoms in your car.