We're obviously all entitled to our own opinions, but for me, I just don't see any benefit in introducing a teenager to Penis Enlargement other than gaining size. And if that's what you want to do, then that's entirely the individual father's decision.
As for health, though, when I was a teenager, [words=http://fleshlight.sjv.io/c/348327/302851/4702]stamina[/words] was never an issue. Nor was it for any buddy of mine. Some guys might cum too quickly, but that's not a health or [words=http://fleshlight.sjv.io/c/348327/302851/4702]stamina[/words] issue, that's an issue of being overly excited. When I was a teenager, I could fuck, cum, get hard and fuck all over again. I came several times a day (mainly through masturbation) every day. Healthy, active teenage boys simply don't have [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]penis health[/words] issues.
As for preventative maintenance, that would be like teaching a teenage girl to use a walker, because someday when she's older she might get osteoporosis. It's simply too early to be even thinking about such things. I would never introduce my son to this. He has much more important things to worry about like school, sports, dating, getting into college, etc.
This is simply my opinion, and I respect anybody else who may differ with it.