Are you one to make your S/O stop talking to their guy/girl friends or let alone any friends? Or can you trust them enough?

I’m seeing this guy who insists that I stop talking to all of my friends knowing they’re all guys. I feel like that the most immature idea. It’s understandable due to trust issues but I should be able to be trusted. In my mind I would let him “talk” to anyone as in hang out; my leash around his collar would be loose in the easiest words. Why do you make your rules, your rules?