Joke stolen from: Best of Humor

Chad went to a bar and ordered a drink. A few minutes, a beautiful blonde sat down next to him and started coming on to him. Soon she invited him back to her place. Overcome with excitement, Chad agreed. When they got to the bedroom, Chad exclaimed "Wow! A waterbed. I've never had sex on a waterbed before."Soon they were both naked and going at it. The blonde stopped him and said, "Before we go any further, don't you think you should put on some protection?"Good idea," he responded and got up. Chad walked out of the room, and when he came back, he was wearing a life preserver.