Hi Phil
Listen mate...Nobody is saying they don't want you to succeed as a bodybuilder, in fact, they're saying quite the opposite!
Okay, so risks and arguments aside for the moment. Let's say okay, it's fine to use steroids at 18 or 19 years old and you should go for it. And you've decided to do your cycle and then another, and then another, until you've done 5 or 6 cycles before your 21st birthday. So now you've put on 30Ibs of muscle and you're very happy and all that. So, what next???
You're 21 and you've done spent more of your lifting time (three years) using drugs than time you spent training naturally. What is your next big step to get bigger?
Don't forget, that unless you decide to go for much bigger doses of harsher drugs there's nowhere to really go from here-on. So at 21 you've decided the only thing to do is either quit because you've gone as far as you can go anyway, at great cost to your young and natural health...or...you can go that bit further than anyone else has been and put all your chips on incredibly large and expensive doses of the most potent (and the most side-effects) drugs available: Dianabol, Anadrol, Winstrol, Trenbalone, NPP, and massive amounts of Growth Hormone.
Now at 21, you've almost made your decision then along comes a girl in your life. This girl sweeps you off your feet and training all of a sudden takes a back seat. You've fallen in love and decided this is the girl you want to spend the rest of your life with. Before long, times has flown by and your married, and about to take the big leap into fatherhood. Well, that was the plan...
Unfortunately, you've spent more time in the bedroom of the last two years than you have in the gym. Why?
Well, because you're trying to get your wife pregnant but it's not happened. Somethings very wrong!
Bottom line: Your doctor says the years of steroid abuse at such a tender age has caused your testicles to shut down and no amount of HCG or other drugs is going to get your sack firing I'm afraid. You are sterile

. You cannot have children.
There's so many reasons not to do AAS at your age, but unfortunately this is more commonly becoming a lesson learned in hindsight rather than prediligence.
Nobody is saying don't use AAS. They are just saying: Not yet!
We hope you use all the other avenues first: Nutritional supplements, testosterone boosters, good and varied training, rest and good food

.
Craig