For example, I was never given any privacy by my father. It's almost as if he was actively trying to catch me masturbating because he would burst into my room without any warning.
I remember coming home from school and my stepmother, during the day, had snooped through my room and found my stack of Page 3's from The Sun (this was before a bit of blue was so readily available on phones).
They ridiculed me for it. Not in a religious way or anything. Just making fun of me for, God forbid, doing what a normal teenage boy would do.
Anyway, my different approach has been to give my son absolute privacy.
I knock on his bedroom door and wait for him to let me in. Whatever is in his room is his to do with as he pleases (Within reason obviously. No drugs etc).
I asked him if he wanted a lock on his door and he said there was no need. Which I'm proud of, for myself and my son.