Question, could this be medical? That being said, my older brother was not that into masturbation. One day he just said he wasn't going to do it any more. This was while we were still in high school.
Take care,

"Don't walk in front of me, I may not follow. Don't walk behind me, I may not lead. Just walk beside me and be my friend." - Albert Camus
Pretty much my life as I have posted so far. Triggers!