Bf too horny???

So I was looking for something in the laundry hamper today and noticed there were 4 dirty towels my bf had used to jack off. BUT we just did laundry 4 days ago so that means he’s done it every day since then. We’ve discussed this issue before but he won’t seem to stop watching porn and doing this so often. I’m not upset about him doing it, it’s the fact he’s doing it so often.

Any advice on how to bring this up and possibly fix this issue once and for all?