daughter taught you a lesson

Dr. WJC came into the conference room. Everyone looked at him as his nose was with a bandage.

"What happened?" Asked.

"Oh, it's an accident."

"What?"

"My wife asked me to take care of my daughter. I's holding her, while watching a basketball game on TV, talking  over the phone with friend, doing a crossword puzzle. She wanted to talk with me - got cranky - suddenly she bit me on the nose!"

"Wow! That's the perils of multi-tasking! " Hillary said conclusively.

"Yeah, your daughter taught you a lesson in the perils of multi-tasking." Everyone else responded knocking head.

Dr. W didn't ask for multi-tasking ever since.