I found porn on Google history about 8 months ago. I had spoke to my 12 year old then and explained that it's ok to be curious and that he had a peek but it's not healthy and it doesn't reflect real life sex. All seemed to be good until I saw the recent pages he logged into on his phone and there was a few porn pages. I didn't fly off the hook and go mad but instead I turned on restrictions on our broadband and the mobile provider. Spam sites didn't work. Then I checked his history again and found he still searched for it and searched the question "why is porn sites not showing" .
He doesn't know I have access to his phone, if I mentioned I looked through, he'll probably change his password.
I regret not putting restrictions on earlier before this could even happen but I honestly trusted him and didn't want to make him feel too restricted where he would seek behind my back and start lying.
I know it's normal to be curious but I'm worried.
Anyone have any advice what I should do. Should I talk to him? But I did last time and he still searched for it again 