Total Enhance RX Stretching techniques work to enlarge your penis and they can be done manually with nothing more than your hand. The only problem with this method is that while you are doing it you can't really do anything else other than watch t.v you can't measure the Male Enhancement tensile stress and it's hard to keep a grip long enough to see any decent gains.

https://healthtalkrev.com/total-enhance-rx/
https://totalenhancerx.hatenablog.jp/
https://www.youtube.com/watch?v=936UskxtnB4