My girlfriend invited me to her house. I found her sister alone
in the house, she was unbelievably sexy and whispered in my ear,
"I have feelings for you, shall we have sex?", I immediately
turned around and walked to the front door to go to my car.
I found my girlfriend standing there, she hugged me and said:
"You've won my trust!"
Moral of the story: always keep your condoms in the car."