Anyone who can orgasm knows exactly how they got there because orgasm involves releasing the sexual tension that builds from mental arousal. It is a reasonably reliable process.
Do you not find orgasm a reliable process? I certainly do. I know exactly what turns me on and what anatomy and stimulation technique is involved. It is an instinctive behaviour and doesn't vary much each time. It is one of the most primitive and fundamental responses of the human body (especially male) otherwise none of us would be here!