To a lot of men, vasectomy is a word they can't even say much less think of having one done to them. The fact of the matter is that not much is really changed by having one. The body still produces hormones, sperm and seminal fluid. The only real difference is that instead of the sperm being ejaculated, it is harmlessly absorbed by the body.
Of course no surgery is without risk but vasectomies are very routine and are usually conducted in the Dr.'s office with a local anesthetic. The Dr. makes 2 small incisions in which he can then find, snip and seal the vas deferens so that the sperm can no longer travel through them. Recovery is usually only a couple of days but can be up to a couple of weeks before all sperm is gone from the stored semen.
If there is a need for the vasectomy to be reversed, it is possible. However, there is only about a 50/50 chance that the surgery will be successful. Some men become infertile due to antibodies produced after the surgery.