Pump donut helps? Or is it just me?

Usually I would pump, form a donut, then let the foreskin/donut go over the head of the penis after pumping so that the donut would go away, but I felt like that was constricting the head and not allowing the head to stay pumped thereby decreasing chances of getting permanent penis head enlargement.

Tried something different. This time, keep the foreskin/donut “choking” the head of the penis, and this seems to create a slight stretch (the donut pushes against the head causing a slight all-day stretch) and the head stays larger than normal. Of course, the donut stays around for most of the day when normally it would disappear after some hours.

Donut seems inconsistent, the skin seems to want to go over the head at some points, so I am wearing a fairly loose rubber ring behind the glans/head to keep the donut/foreskin back. Seems to work. A device to provide a slight stretch would be a perfect next step.