This is the “Dry” version of Jelqing. Similar to Techniques 1 and 2, but without the lubrication.
In “dry” milking, you squeeze and pull the skin, but you don’t slide your fingers over the skin. As the penis becomes too large to cover in one stroke, work on the base and middle of the shaft separately.
Some guys like to milk “dry” in the morning before getting out of bed (when testosterone levels are the highest.) If you find your penis is getting sore, take a day off.