If you are looking for good reasons to undergo a vasectomy, you can start with the fact that the procedure is 99% effective in preventing pregnancy, a higher success rate than either birth control pills or condoms. A vasectomy is also a relatively straightforward procedure that requires a tiny incision in the scrotum (under local anesthesia), after which the vas deferens are located and blocked or cut (to prevent sperm from traveling through the tubes). The procedure only takes 30 minutes, and the downtime is short. The risk of infection is less than 3%, and fewer than 10% of men experience significant pain following surgery. Most men take the day off and return to work the next day.
P.S. Most men experience a noticeable improvement in their sex lives after vasectomy. However, the procedure does not eliminate the risk of sexually transmitted infections.