A lecture about English
A linguistics professor was lecturing to his English class one day. "In English," he said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."

A voice from the back of the room piped up, "Yeah, right."

A henpecked husband...
A henpecked husband was advised by a psychiatrist to assert himself. "You don't have to let your wife bully you," he said. "Go home and show her you're the boss." The husband decided to take the doctor's advice. He wenthome, slammed the door, shook his fist in his wife's face, and growled, "From now on you're taking orders from me. I want my supper right now, and when you get it on the table, go upstairs and lay out my clothes. Tonight I am going out with the boys. You are going to stay at home where you belong. Another thing, you know who is going to tie my bow tie?""I certainly do," said his wife calmly, "the undertaker."