My girlfriend invited me to her house where I found her sister alone. So I sat their waiting for my girlfriend while her unbelievably sexy sister was sitting their with me. A few moments go by, then she comes up next to me, and whispers in my ear 'we should have sex before my sister comes home'. I immediately got up and turned around to walk to my car. I found my girlfriend standing by the door, at which point she hugged me and said 'you've won my trust'. Moral of the story, always keep your condoms in your car - Karl Clements