Right, there is no real side effects, you can expect to get a flushed face, shift in blue vision, euphoria and that is all of the side effects. Long term you could become Psychologically addicted but that is easy to avoid by only using it when needed (fatigue, anxiety on a date, etc) I use it on and off for over 10 years now with no psychological dependency.
I always do my SSJ in a flaccid pumped state. Which is basically full erection length but am able to bend the muscle and stretch it in an easier manner.