Was it something he wasn’t supposed to see? Like a gift or surprise for him?

My husband doesn’t touch my packages but I open his because he wants me to. He tends not to open mail or packages and it would sit there forever so unless he asks not to open (gift for me) I open it.

Did you tell him you don’t want him to open things? Why do you think he is jealous?

Honestly the biggest issue here is that you don’t want to discuss it. Is every discussion turn into a fight? Why does it have to be a fight? I think you might have more issues than him opening packages. There is nothing I am afraid to discuss. That would be a red flag for me if I worried about bringing things up.