Is the character physically or psychologically addicted to steroid? why?

All of them are both physically and psychologically addicted to Steroid, except the recreational drug user. The recreational steroid user isn't really addicted, because he just wants to have a good body shape with just a little amount of muscle. However he doesn't want to have a burly and a buffed up body like the other characters. The rest of the characters are addicted in both ways, because they are not satisfied with their body. This means that they are keeping on taking the steroids even though they took it, because they think that having huge muscles looks good. (which is not true!!)