I frequently turn my edging sessions into all-day deals... And if I know there's a big event coming up (I.e., it's Tuesday and I know my wife has plans with her bull on Friday), I'll turn it into a multiple day sorta deal. It's difficult, but multiplies the intensity considerably.
It's profoundly hot to work myself up for days at a time, and then watch an entire 4-6 hr session between my wife and her bull while in chastity, and then being able to finally unload once he's done. Especially if I happen to have a fresh bottle of poppers to hit on right before that final ascent towards orgasm.