A man can be sterile if he has a congenital defect that causes sterility or if he chooses to become sterile through surgery including a vasectomy. He might also be sterile if he has suffered trauma or disease that destroys the testicles.
It depends on why the man is sterile. There are many causes. If he has had a vasectomy, an operation to make him sterile, that operation can now be reversed for a majority of men, if they want to go through the hassle and expense. If a man is sterile for some other reason, there are many possible medical reasons and many possible treatments. Only a fertility expert knows all about it.
No this will not make him sterile.
Practice to not make a fool of yourself.
No but they will make his bread rise
Yes
Don't do it.
Tell a joke?
No.
No.
No.
Sniff super glue
Make sure the person doing the biopsy uses sterile aeseptic technique. Perhaps a prophylatic antibiotic out to be given. Do not touch the area without hand washing or using a sterile dressing. Keep wound clean