Your 12yo son Darren is a pleasant open polite and generally well behaved kid. Spanking works with him when he steps out of line but you only need to do it two or three times a year.
Today when you come home from work your wife tells you Darren came home from school in a foul mood, he refused to tell her why when she asked him and when she pushed a bit harder he mouthed off at her with language that is NEVER heard in your house. She has banished him to the guest room away from his electronics to await your return.
When you go up to see him you see Darren's school books on the table, homework apparently done. His pants and underpants are already on the floor beside it and Darren (who has obviously been crying) is sitting reading quietly.
On your entry he stands up and the tears well up again. "I'm really sorry dad. I've had a pig of a day at school and I got paddled unfairly but I should never have blown off at Mom like that. I know I deserve it so let's just get it over with."