Masturhate

He was good at putting himself down and punishing himself.
Everything he did resulted in him chastising himself. "You useless fucker, Fred," he would yell at himself after another trivial failure.
The latest punishment involved food. He hadn't eaten for four days after he forgot to record the programme after the news that he wamted to see.
"No breakfast for you," he told himself the following morning upon realising his error. The cereal he had prepared was poured into the bin.
The more upset he became the more he punished himself.
"Perk up or there will be no dinner."
And so it continued. He had slept on the couch for two nights as he deemed the bed to be too comfortable for such a loser.
He knew there was something not right about his behaviour, but in a perverse way he enjoyed it. He felt that it helped him maintain discipline.
The fact that he enjoyed it meant he needed to punish himself in a different way. He decided to give himself the worst punishment possible for enjoying punishment. He allowed himself a sandwich and went to bed. That would show him.