Hey, just my experience with edging and trying to hold off up to 1 week. It all depends how horny you feel after not letting yourself cum after edging all week. If you are not edging all the time, no sense going 1 week. A few days, edging daily and you see the difference.
The anticipation of knowing that i'm going to cum after not allowing it, makes me cum more... The physical part of edging does seriously increase my libido. Not cumming just keep me horny all the time. The mental has a lot to play with it too. If you want to get bigger loads to surprise your gf, edging is the way to go. Just be careful not to over do it, as 15shooter said. I never got blue balls from edging, and i've edged a lot. Some guys get blue balls after a couple of hours, others longer times or not at all. Listen to your body and stop if it starts aching. You won't get much pleasure from it.
I've edged too much and started to get sore, I just take a break and continue later. Most times, edging as been very enjoyable and very intense. Only a few times, too much edging actually didn't work out and had reverse effect. Just pace it and will get amazing feelings and more cum.