A Fb friend suggested this old video.

Reuploading reduced the visual quality of the material, but this is still worth a look. Note her reaction, two or three times, as he touched the nape with the clippers. He certainlywanted her to feel the blades, he aimed at an exposed area, not directly at her hair.
The style is still fashionable in terms of the nape but the sides are kind of outdated.
Posted by Harriet.