Dealing with this part of the haircut is always a matter of what the person wants, but there are some things to be aware of.
1. If the bottom neck hair is to be blocked, you need to ask if they want the corners–where the side of the neck hair meets the bottom hair–square (or nearly so) or rounded somewhat. Usually rounded works best.
2. If they ask what neck hair treatment you suggest, point out that tapered neck hair has the advantage of keeping a good appearance longer, as it grows out. Blocked neck hair has “stubble” showing up below the block line after a week or so–it “begs” to be cut again. As a tapered neck grows out it looks like it was left a bit long, i.e., not clipped real short. The tapered neck hair still looks “fresh” after several weeks.
3. If the neck hair is blocked, it should have the bottom 1/2 to 1 or more inches tapered shorter than the hair on the upper back. Leave the hair at least a quarter-inch long where the line will be, and be sure to keep the block line as low as possible.
Our ideals, laws and customs should be based on the proposition that each generation in turn becomes the custodian rather than the absolute owner of our resources–and each generation has the obligation to pass this inheritance on to the future.