This isn't necessarily a parenting fail. OP's son could be mentally ill.

this is the biggest bullshit fml ever

Live and let live yo. To each their own and all that others BS.

I used to suck my thumb at night until I was about twelve. Why did I stop? My mom gave me a dvd player. So the secret to good parenting... Bribes!

FAKE, look at this persons other FML stories

He's just rolling. It'll pass...

It's pretty unlikely that there is ANY sexual context to this. It's just an oral fixation, like nail biting or gum chewing, only a lot stronger.

YDI for not trying to cut the umbilical cord until the ****** was 20! you do know that you have ruined his life and he is never going to lose his virginity or move out of your house...right?

Why are you tryna stop him now? You shoulda been did that a long time ago!

What you need to do in give him something else that will make him feel better to have with him to sleep.