A man and woman had been married for 30 years.
And in those 30 years, they always left the lights off when having s*x.
He was embarrassed and scared that he couldn't please her, so he always used a big dildo on her.
All these years she had no clue. One day, she decided to reach over and flip the light switch on and saw that he was using a dildo. She said "I knew it, asshole, explain the dildo!" He said, "Explain the kids!"