For foreskin, it's about tugging on the skin from the half way point to the base of the glans whenever you can. It can be manual pull to wrap with the foreskin while the skin being pull. This is why we use the vacuum cup from the SiliStretcher to prevent foreskin from stretching, but you can use the extender with the straps or a traction method to pull or push the skin away from the base of the penis. If you have the SiliStretcher, you can wrap the middle of the penis with a good bulk, like TheraBand, generate a suction on the flaccid glans and bulk of the skin, and have it under tension for hours on end. I'll definitely need to get a good photo of this for the brother. I accidentally encountered this method when I first got the SiliStretcher.