Need to change this aspect of my life, for real!

Hey y'all, I'm 45, male, and have a casual relationship with pornography that is providing no value whatsoever, and is resulting in me hiding my behavior from my wife whom I love dearly. It's pointless and I'm just completely sick of it. Sick of making sure the door is closed, and finding a quiet time when she is asleep. It's dishonest and I think harmful to the overall level of trust we have as a team.

I would probably average in the realms of 5-7 times per week, where I will have multiple days with nothing at all, and then a day when she is out for errands where I'll do it once or twice. None of the pornography that I'm seeking is very hard core; it's always just younger girls who remind me of being in my early twenties and make me feel rejuvenated somehow by seeing them strip naked. They also trigger memories of my earlier girlfriends, and how I felt being with them all that time ago. But I've noticed that I just never seem to get enough of this... how many 20 year old girls will I need to see naked before I die before I get my "fill"? I feel that my brain's current answer to this question is "infinity", and that's just not sustainable, and is entirely ridiculous.

I also feel that seeing these images might eventually have an impact on me later in life where I'll do something stupid and ruin the best relationship I've ever had. I need to re-gain control, so I've signed up! I'm doing PM only; I want to continue having sexual relations with my wife throughout, but I just can't see any place in my future for pornography again.

Aiming for 90 days at first; will re-evaluate as I progress, but want to kick this forever.

I have some form; I set myself a challenge to be vegetarian for a year a while ago, and have been vegetarian ever since - just over 9 years now. So I know that I can do this if I set my mind to it.

Good luck to everyone else who is making this bold decision!