That is true according to the Yerkes-Dodson Law
Teens who engage in sexual intercourse early might end up being bullied and labelled in a negative way as unfortunately we live in a society that does that. Friends and family might turn their backs on them and make them feel socially isolated. They could end up pregnant and still have to attend school while pregnant and deal with extra abuse from other kids and possibly teachers.
I am a bit confused by your grammar, but I am guessing it was just a typo and you are asking why some athletes use steroids illegally. (no worries!)
Some athletes take a form of steroids — known as anabolic-androgenic steroids or just anabolic steroids — to increase their muscle mass and strength. It depends on the steroid, but most athletes who do take them are trying to improve their performance. I cannot answer as to why they do it illegally, it depends on what is going on in there head, but the above is why they may. Hope this helps, have a nice day!