How long do you masturbate for?

I think the longest time I have masturbated is for about 30 minutes. I try not to put to much feeling into my cock, if you know what I mean. I find the longer you do it for, you produce a lot more cum, and at the peak of orgasm, it feels so good.

I also do it sometimes with KY, and I have a way of making it feel so much better. Only thing is, I don't last long enough. Has anybody any tips on how to last for a long time whilst masturbating with lube?

Schumi