i think the most ive gone is.....maybe 2-4 hours, all depending on how long its been since ive last jacked it. allooooot of stop-and-go involved hahaha. i dont know about anyone else, but after youre done, are your balls so sensitive they almost hurt?
About an hour is the norm for me, the urge to cum is just too much! Two hours is the most I can manage. I tried to set a new personal record today, but have just finished after about an hour and a half . Oh well, it was good though.