it's always interesting to me when a community brings together people who do something for disparate reasons, because as far as I can tell, all these guys are edging for extremely different reasons.
the dude building up his stamina through masturbating is clearly doing it out of some kind of belief it'll make him better at sex. there's your run of the mill tantric/taoist sex guys talking about the spiritual experience of retrograde ejaculation. the 50 year old guy and his wife are just engaging in some consensual light BDSM play. some of these guys are just really turned on by the idea of not being allowed to cum and there's some guys in there that are basically just describing the symptoms of clinical depression.
they're all almost having an orgasm, but their reasons are so varied that it feels like this community can't answer the needs of any of them