Another great session. You edge so close then hold it to extend the sensation as long as possible then edge yourself close again. Like tantric sex. Perhaps we should call it tantric masturbation and you are a guru of it. You should teach it. That is, how to extend pleasure and amplify one's ejaculation to amazing heights through frequent and sustained masturbation. You would have a full classroom, old and young, just eager for your guidance and encouragement. Kind like Dodson and Ross do for female masturbation.