Totaly depends on the person and what's normal for you. I normally rub one out twice a day, on average, and am always good for 2 pops in an hour if the girl is worth (me) seeing in the first place; so it's not an issue. But sometimes, if I know I'm planning on seeing someone who clicks with me, I'll purposely abstain for a couple of days beforehand, just because it's that much more satisfying a nut. One day isn't too difficult; two days is harder and three days is about my limit, by which time I'm like one of those elephant bulls in musth, with constant semi-wood and if I see anything that catches my eye, dripping precum on first sight.