Ok, being a guy, I'll try to answer that one for you. I say try, because like I said, I don't shave, but I had to do it once before surgery, so my experience is limited lol.
I remember doing it without shaving foam and being veeeery carefulYou don't want to lose anything now do you?
The skin on the balls isn't really smooth, it is rather slack, so you have to be carefull not to rimple it, but stretch it a bit and hold it as smooth and as possible not to cut yourself.
So I found it rather hard and stressful, not my thought of fun. I'd rather not do it every week.