lol you’re funny today, mr p.

I am not sure of doing all that, but Lucy, you have my prayers!

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I may be funny, but I am dead serious. (I am in somewhat of a whimsical mode, because today is my first day off from work in months.)
Look, Lucy: your love your husband, correct? And you want the best for him, correct? This includes salvation, correct?
Your husband is living in mortal sin. If he died today, he would die in mortal sin. What happens to souls who are unrepentant of mortal sin? We all know the answer to that question.
Masturbation is clearly defined as mortal sin, in the catechism. This is true of any type of sexual misconduct. It is always gravely sin.
You list the following characteristics of your husband: “He’s a great father, a generous and fun person to be around, very pleasant to live with, and has a wonderful attitude and a positive outlook on life.”
I have to say it, but in God’s eyes, this counts for nothing. If he dies in a state of mortal sin, you know the result.
So do what you can, to put a stop to this. I don’t know if the “Pampers” approach will work - this is a suggestion that I made, based on limited information. You’re his spouse, so you can probably gauge better than any of us, what approach will work.
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p.s., I know my position on this subject have been controversial. If you are going to object to my approach, please tell me a) if any of my advice has violated any part of the canons, and b) if anything I have said has been uncharitable.
There is nothing more charitable than saving someone from a life of mortal sin.