The AAS and bigger dick is just an increase in erection quality that was lacking before, and now the full potential is being met. This is the basis of the angion method. Its cardio for your dick essentially.
This can be paired with mechanical stimuli like pumping/clamping for girth and stretching for lenght, although in my few years of being around on the subreddits they are all important in their own right. angion compliments mechanical if you want to do it, and vice versa. the tunica is the main hinderance and it comes down to genetics how many layers of tunica you have, this gives rise to the term easy or hard gainers.
Stretching with a hanger/stretcher longitudinally helps in girth as you want to break down the tunica fibers and stretch them making it easier to get better expansion outward when clamping or pumping. Ive been doing it on and off for 2 years and dont have amazing results. 0.4inch lenght and 0.2 girth. it aint much but its a volume increse which i notice and when i pumo i can get up to 5.2 inch from 5.
I have a tough tunica and the gains are hard, its also easier to hurt yourself going to hard, which is like taking 2 steps backward after 1 step forward. Low and slow is the only way, but that advice is not considered by most who want gains fast as happened with me.
Too much can fuck up your nerves and give hard flacid condition which is an imbalance in the kegaling muscles and pelvic floor. Maybe AAS helps the pelvic floor in some way which can lead to better erections if the muscles were underdeveloped.
Daily cialis is used to help blood flow which aids in healing, it also lowers bp so its good to take if your own gear, because high systemic bp is not good for EQ even if you think erection are all about high blood pressure locally.
HGH could help as the pathway is different and higher IGF-1 levels chronically do grow organs and different types of tissues, the dose makes the poison in that regard.
From what ive read, DHT work in puberty, from personal anecdotal evidence, my friends who had beards by 17 and bald a few years later had more girth then adverage when we were younger. Changing DHT levels and re-activating androgen receptors is somthing im not familiar with and wouldnt fuck with either as I like my hair.
DMSO is used to weaken the tunica when applied in a DILUTE concentration to the shaft, ive heard people mixing it with iodine and it could be a helpful add-on as its pretty safe when diluted otherwise getting it anywhere near your balls will be very toxic to them from what I read.
PGE-1 or Caverject/Trimex seems to be the only drug you can take to increase perminantly, its used in a way to mimic what happens with the guys who have fucking huuuuge dongs suffering from sickle cell anemia, called megaophallus where they have priapism (uncontrolled erection for many hours) which increases their size but leaves them unable to use it. their sizes are bonkers and not wanted, but prolonged erections for many hours breaks down the tunics perfectly without any problems from clamping and such, just have Sudafed on hand to stop it.
I will be getting some soon along with 31g or 32 needles to overcome the tough tunica I have, TB500 is also reccomended to revert any fibrosis which will be the main factor to consider. r/pharmaPE is a subreddit with people already active and it can be a good read. but obviously DYOR
reading back over the comments
@milligrams already has some solid information and advice, anything beyond angion requires alot of respect for yourself, damaging your penis is not like pulling your muscle, you only got one and its for life.