Tren and Deca Dick...
Mostly a psychological state...
Usually fed by ones knowledge reading about these things and anecdotal evidence from others weighting in on there experiences.
Remember , the actual HORMONES themselves have very little to do with
achieving an erection that can penetrate.
If it where so hormonaly dependent, T:E ratio etc... Transvestites on hormone therapies (High levels E, very low T) would NOT be able to achieve a spontaneous erection, and neither would medical eunuchs. Studies have also been done that show with stimulation, both actually get a regular erection, have sex, and orgasm. (although ejaculate which would be minimal in volume and not contain any sperm).
So can STEROIDS cause ED?
Yes! but through a different mechanism than we are looking at that is EASILY controlled. Certain steroids activate receptors in the brain that indirectly influence the GABA cycle, this in turn calls in your adrenal response to secret more adrenaline... cortisol is elevated ... and now, in the LONG RUN you can get elevated prolactine.
But thats a cumulative effect.
The first part of the equation, is what you need to look at.
Adrenaline is anxiety in a healthy individual and your BODY does not like to send blood to you extremities (penis). When in a fight or flight mode its not thinking of FU^&*$G.
Once you are aware of whats happening chemically, you will be able to control the anxiety actively.
RELAX thats the name of the game , and stop rerunning all that you read , heard, AI, T, E, conversions, 5alpha, DHT and all that. Spontaneous erections is a very natural thing, it starts in YOUR HEAD.
Im not a medical doctor but Im over 50 years old now and PED have NEVER influenced the possibility to achieve an erection yet.
If the libido is there, youre 90% good to go.