I agree with you. I have a small dick and even pulling on it, it never grew. When I was young and rocking hard, my dick never got bigger than 4 inches. Now that I'm old, my dick is just 3 inches and it's not stiff. ..
Good advice if you're not getting rock hard. You should be able to get rock hard daily for at least 20 minutes straight. If you can't you need to make some changes to get healthy. Daily erections and regular orgasms are very important for your sexual health and overall health.
my tips for a big penis : be as thin as possible and exercise - this reduces fat clogging vessels so more flow to penis. Also dont masturbate too much as that can damage penis. Leave 4 days without masturbating if you dont get morning wood to allow repair to happen. You get erections at night which last 2hrs in bed. By maximising bld flow during night erections this will expand size over time. dont wear underwear in bed so erections arent restricted