Essentially whats taking place is the improvement with the signaling in the brain,with the CNS and neuro-trasmitters, when it concerns epinephrine and norepinephrine and serotoin, dopamine and other brain chemicals,given a sense of euphoria ...AAS and other androgens improve these pathways (with an expressed presence of fatty acids and amino acids which target the NS,NT's), increasing the sense of well being by providing an amplification with self-esteem and hyperactivity,thus promoting ones mood as well as sensitizing other receptors throughout the body. Feeling like you posses a more keen sense of whats taking place around you,alertness, ability to focus,memory, even having a healthy sustained conversation with someone with utmost confidence, this also applies with sex drive,lust,euphoria,attraction, keen interest in someone or something,sense of reward or accomplishment ex..This also pertains to the stimulation of the Amygdala-a ganglion of the limbic system adjoining the temporal lobe of the brain which is involved in emotions of fear and aggression..
With that being said, many are able to harness the aggregation, and utilize it to ones advantage, applying it to the gym.
Sorry to geek out on you here!