with their only knowledge being that if you lift weights your muscles grow... all you have to do is say " ive been working out everyday for the past 20 years" and they will not doubt for a second your natural. even if your jay cutler.
this actually holds some merit. i used to go to a prowrestling forum, and people would swear that john cena, the rock, etc. were natural. 'cena has trained his whole life' 'rock is samoan/black, they are natural big guys' 'they wouldnt they could get fired for it (lol)' . people even claiming how training hard and using lots of supplements would get you in steroid shape (this was said seriously). its not hard to convince the untrained or inexperienced of a falsehood.
whites will generally believe a black doesnt 'need' steroids to look liek a bodybuilder. youngins' are either naive about it or dont want to believe they need steroids to look like a bb (this usually is resolved after a few years of training, they see the light).