Have you checked out if you relate to symptoms of POIS post orgasmic illness syndrome Reddit - Dive into anything ?The biggest improvement I ever noticed to penis size was after my first 3 month semen retention stint. This is why I think mechanical manipulation is pointless. Penis size is purely hormonal. Porn and masturbation in the formative years causes arrested development. It's functional castration. I started my first serious run at semen retention when I was 27 after fraternising with girls and watching entirely too much porn since puberty. I realised while doing it that I was essentially going through a second puberty at 27 or at least picking up where I left off. I had delayed the masculinisation process by excreting wastefully what it means to be a man. Semen. The improvement is not linear however. It's cyclical. In fact the penis will shrink when you hit the infamous flatline period, but I promise you this is the corrective process. I think this is why people don't understand the benefits of semen retention. they panic and quit at the first sign of trouble and rationalise semen retention as bad. These people are weak willed and devoid of faith. If they had faith they would have understood the cyclical nature of the improvement. things get worse, then better, then worse, then better etc all the while the baseline is improving.
One of the most welcome changes from semen retention after 3 weeks-1month was much deeper sleep. Now this benefit alone has the capacity to improve hormones and practically every single thing about an organism. I noticed many benefits besides sleep but I will just mention 2 in relation to masculinisation. Penis size increase and deeper voice. the size increase is not a transient thing either. It was a stable fixture in my life after 3 months. It would take an awful lot of porn and masturbation to reduce it back down again.
Semen wastage causes sexual exhaustion which mirrors all of the symptoms of hypothyroidism. The consistent influx of pleasure hormones causes desensitisation of neurotransmitters leading to a decline in functionality and efficiency, meaning that you need more and more to achieve the same level of satisfaction and virility. "use it or lose it" when it comes to the penis is just flat out wrong. In fact leaving it alone and ceasing the frivolous stimulation, tugging and squeezing allows the penis to expand back to normal so that it looks fuller. Leave your poor penises alone gentlemen. They have seen too much abuse.