I compare to the craving of alcohol, cigarettes or drugs. The first spark it's up to you to decide to full that impulsiveness.
For example, I noticed that the window of the bathroom at my office it's plausibly accessible, but I contain myself because I didn't want to my colleagues or my boss to think that I did it by job stress, nor to make a mess at the sidewalk or parking garage.
But it's my personal opinion. I see suicide more like a spiritual ritual (Yes, I know it sounds contradictory or culty), rather than an act like going for an ice cream or looking a movie to watch. Some days the craving to do so is so intense that I push myself to do an activity to avoid it, like opening a streaming app or a casual mobile game.