Ngl that's me and ngl porn or no porn it doesn't matter. For me the porn isn't necessarily the problem the masterbating is. Porn just multiples the problem. A month without porn I was still masterbating 3-4 times daily. I tried semen retention for about a week, I would like to do it for months but it seems impossible.
It's fine just try to do it differently each time. Don't do it just one specific way (like always laying on your left side humping sheets, for example) as then you will have a hard time in real situations and will be "stuck" in that position to reach climax.