Vasectomy. Before I got my vasectomy, I had a lot of anxiety that the condom might fail and an unwanted pregnancy would occur. That’s not to say vasectomies can’t fail, they can, even years afterwards, recanalization can happen so I get tested every year.
Annual failure rate of condom (average use) is 18%, and with perfect use it’s 2%. This means that over a span of 20 years, even with perfect use, there is a 33% chance for a pregnancy which is too high for me. A vasectomy with annual testing of sperm count is as close to zero as possible.