Thumbsucking Sam!/Dean [FOUND]
Hi, I'm looking for a fic where Sam has a habit of sucking his fingers/thumb when he's little and John doesn't like it so he goes out of his way to make Sammy stop, like putting hot sauce on his finger and putting a nail polish that tasted bad and painting his nail and if it started to fade fast that's the way john finds out he still sucking his thumb so he beats sammy even if he 'doesn't want to' in the long run Dean gives Sam his thumb to suck. It leads later on to 'other' things as they get older like sucking his c**k as instead of dean's thumb. I know that in the ending after a blowjob they have sex together and I think it ends.