Men avoid vasectomies as a result of it being permanent and due to misconceptions about sexual function as well as concerns about regret and because of the perception that contraception is primarily the responsibility of a woman.
Also a lack of knowledge about the vasectomy procedure also factors into why men avoid vasectomies.
The main fear of vasectomies for men is that it's so permanent and some men worry about losing some of their virility and their ability to enjoy sex.
However in reality and physiologically, a vasectomy does not actually affect any of these functions.
With a vasectomy you cannot usually get a woman pregnant but you can still enjoy sex and even masturbation if you prefer to do so.
The reason I say you cannot "usually" get a woman pregnant after having a vasectomy is because there's still a very small chance of getting a woman pregnant after a vasectomy, mainly due to factors such as residual sperm or even the vas deferens reconnecting which can in rare cases occur.
However vasectomies are a highly effective form of birth control and has a very low failure rate.
Although in some cases sperm may remain in the mans ejaculatory ducts after the vasectomy and these sperm can still fertilize an egg if you have sex with a woman.
In rare cases the vas deferens which are the tubes that carry sperm and are disconnected during a vasectomy can reconnect and allow sperm to pass through again and result in pregnancy and in rare cases, the vasectomy may not fully block the vas deferens.
It's also important that if you do have unprotected sex, that you should wait at least a few months after the vasectomy, and have a semen analysis done to confirm that there's is not sperm left to ejaculate.
A vasectomy is a surgical procedure for male sterilization, that prevents pregnancy by cutting and sealing off the vas deferens which are the tubes that carry sperm.
And while it's a high effective and permanent form of birth control, the vasectomy does not protect you against any sexually transmitted infections.