I read this fic awhile ago but I don't remember the name if it, sorry if this offends people..

Dean was raped and he had been taking pills for some reason (for pain I think) and john found out about the pills and thought he was selling them for money and spanked him, and just after he found out about what happend to dean and felt guilty I think it was on ff.net but that's all I remember, I hope someone knows this fic. Thank you :)