When you are just young and you are not able to discuss your problems related to erection to anyone you tend to face with a lot of behavioral changes.  The lack of total control over your erection process can also interfere with your education. 

You might not be able to focus enough on your grades and when you are behaving with girls you might feel kind of strange and you will try to prove your macho-ness every now and then with bizarre behavior. You might develop an inability to communicate with girls and you might think that you might not have the ability to have sex with girls always. This will eventually have you to quench your thirst for sexual pleasure by masturbation. 

Masturbation tends to have you think that you are quenching your thirst for sex; however, you will be a bit frustrated with it, and in reality you will not be able to fully satisfy your sensual feelings by just masturbating.  When all this is going on within, the young boy is silent within reluctant to discuss with their parents about it, and even if they do, not all parents are educated and sensible enough to express things in a good way to their children.

When it is the peak of puberty then the focus of the boys tends to be to find a solution to this problem.  Eventually, this leads them to be experimenting in to multiple relationships very early in age. They get in to using meds like Sildenafil Citrate to get more better and sustained erection just to prove that they are a better man.