Tagging SO on social media

He's never really been into social media and hardly ever posts anything himself, but I want to tag him in things here and there just for memories. I've never done it, but I know he doesn't like being tagged in things and will remove them when other people do, saying he just doesn't like sharing his life online. Going back through his old photos it looks like he used to allow people to tag him though. I know it's not because he's hiding our relationship or anything like that, but I kind of want to just be normal and be allowed to share things like other couples. Is it stupid that I'm jealous of his past relationships and their public memories? Does your SO have similar habits?