Sterile men can have STDs (catch the infection and pass it as well).
no
It is estimated between 9 and 12 percent of men are infertile. As of 2014, the number of men who are infertile is on the rise.
to prevent STDs.
The main reason men become sterile is the cause of a low sperm count. One could also choose to become sterile and have a vasectomy so as to not have any more children.
cant get pregnant?
No. Some men get their penis / testicles pierced and they are not sterile. But aside from that, your belly button is NOT a reproductive organ. So you cannot become sterile from piercing your bellybutton.
If the man is really sterile, no.
yes
Trichomoniasis is cured with oral medicine, not injections. Gonorrhea and syphilis are STDs cured with injections.
No, not always. There are some cases of primary sterility (where the person has always been sterile) but many times sterility is secondary to another factor. This could be infections such as mumps in adult men, surgeries such as vasectomies, hormonal imbalances, etc.
From what I've heard and from what has been been said recently, there is an ingredient in hand sanitizer that makes males sterile. Hand sanitizer is known to kill bacteria but what is in the sanitizer gets absorbed into the body, which is what causes men to become sterile.
Men can produce fertile sperm throughout their lives. Men can be sterile at any age. Men are not capable of having kids at any age.