I didn't have noticeable hair on my shaft and balls until I was about 40 (I'm one of those breeds that really only grows a lot of hair on the top of the head). But shaving it is a bit impractical even buzzing the sack and balls is a pain.
My wife and I both waxed a few days ago (we got drunk) and I am afraid I will have ingrown hairs again like I did 20 years ago when I did it with a girlfriend (wasn't fun picking out hairs for 6 weeks and all blood and puss that went with it)