A preacher became frustrated that a large part of his congregation was going water skiing on Sunday, rather than coming to church. So he told his wife,"This Sunday, I'm going to preach about the evils of water skiing on Sunday." "What!?" she exclaimed. "That's a silly thing to preach about!" "I don't think so," he said, "It's a problem we need to address." Next Sunday as they were driving to church, the wife asked the preacher what he is going to preach about, somewhat warily. "As I told you," he said, "I'm going to preach about the evils of water skiing on Sundays." "That's idiotic!" the wife says. "First of all, it's a dumb sermon topic and second, the people who need to hear it won't be in church! Why don't you preach about sex or something people are interested in?" "Nope. The Lord wants me to preach about the evils of waterskiing on Sundays, and that's what I'm preaching about," he said firmly. The wife said, "Well, I'm not going to sit through a stupid sermon like that. I'm staying in the car. You can tell the congregation I'm sick or something." And she stayed in the car. As the preacher was walking from the car to his study at the church he began thinking maybe his wife was right, and he changed his mind and gave a brilliant extemporaneous sermon on the biblical teachings of sex. When the service was over, one of the church members stopped by the preacher's car and said to the pastor's wife, "I'm sorry you're not feeling well this morning. Your husband gave the finest sermon today that he's ever given since coming to this church." "I don't know why he thinks he's such an expert on the subject," the wife snapped. "He's only tried it twice, and he fell off both times!"