Erect Stretching

I have read DLD mentioning erect stretching to cement temporary gains.
Can someone suggest how to do stretch erect penis.
Should we use extender?
Should we use length master?
Should we use manual stretch?

I tried all possible methods.
But neither method worked properly.
It's nearly impossible to stretch erect penis.

Please someone suggest best method for erect stretch

It should be a manual stretch. You can stretch in all directions accept between the cheeks. Treat it like any other stretch