In general, a vasectomy is a form of birth control that prevents the release of sperm during ejaculation by cutting or blocking the vas deferens tube. This procedure does not affect a man's ability to have an erection or orgasm. Another misconception is that the procedure will decrease testosterone levels. However, since testosterone is transported through the bloodstream rather than the vas deferens, a vasectomy should not affect testosterone levels.

There are no substantial benefits to vasectomy beyond birth control.

The risks of vasectomy can include:
Bleeding or a blood clot (hematoma) inside the scrotum, blood in the semen, bruising of the scrotum, infection of the surgery site, mild pain or discomfort, swelling, and delayed complications such as chronic pain or sperm granuloma.
Discomfort, bruising, and swelling after surgery that usually goes away within two weeks, hematoma, bleeding under the skin that can lead to painful swelling, and infection that may require medical attention.
Pain, soreness for a few days after the procedure, and other rare complications such as infection, bleeding, and inflammation.
It is important to note that serious complications from vasectomy are rare, and most men do not experience significant side effects. However, any procedure involving surgery carries some level of risk, and it is essential to discuss the potential risks and benefits of vasectomy with a healthcare provider before making a decision.

https://theconversation.com/500k-american-men-get-vasectomies-every-year-a-specialist-explains-the-easy-and-reversible-procedure-186984