Why does my bf need to know every time I masturbate? /u/BagofmostlyWater22 Sex

So he bought new vibrators. Some for me, some for him. He asked me to tell him every time I use them when he isn’t around because it makes him uncomfortable. He says he wants to know because “he’s not pleasing me”. So I’ve been telling him every time. But I didn’t the other night because we were already in an argument. After it was kinda over he asked if I masturbated that day. I said yes. And I also owned up to not wanting to tell him because of the argument and how I didn’t want to make anything worse by throwing that in the mix too. He got really mad and told me it is a “necessity” for me to tell him. That he bought the vibrators for US. I tried asking “what if I did it without the vibrators? Do I still have to tell you?” And he got really quiet and averted the question back to the fact that I didn’t tell him about it and how messed up it is. Am I in the wrong here?

So he bought new vibrators. Some for me, some for him. He asked me to tell him every time I use them when he isn’t around because it makes him uncomfortable. He says he wants to know because “he’s not pleasing me”. So I’ve been telling him every time. But I didn’t the other night because we were already in an argument. After it was kinda over he asked if I masturbated that day. I said yes. And I also owned up to not wanting to tell him because of the argument and how I didn’t want to make anything worse by throwing that in the mix too. He got really mad and told me it is a “necessity” for me to tell him. That he bought the vibrators for US. I tried asking “what if I did it without the vibrators? Do I still have to tell you?” And he got really quiet and averted the question back to the fact that I didn’t tell him about it and how messed up it is. Am I in the wrong here?