punctuation humor

While Chris was getting dressed to take Ben to Basketball practice, Ben was trying to convince his dad to skip practice and let him go to Culver's early.  He wanted to see a friend there who was going earlier than we were for the Lincoln Culver's Fundraiser Night.  After much bickering, Chris finally said, " We are going to practice and then Culver's, PERIOD!"  Ben then asks, "Why did you say 'period?'"  Chris just laughed and said, "good question!"  Then Ben says, "What are you going to wear to practice, question mark?"