Personally I've found that fapping is an issue when I'm bored and my brain is looking for some stimulation. Idle hands and all that. I try to have a personal rule where, when I get the urge, I get up, walk around, do dishes, anything to get my mind into another place instead of falling down the rabbit hole. It doesn't help that there is an absolute torrent of sexual imagery available via porn, IG models, etc. Our brain truly gets hooked on this stuff and is always looking to scratch that itch.