The purpose of a testicular exam is to explore the area for abnormalities. During puberty is a good place to start examining the testicles for lumps or swellings. But today is just as good a time to start. Positive finds could indicate early sign of cancer. Early detection can almost guarantee certain cure.
Self-examination should be performed once every month. The entire task should take just a few minutes. This is a small but significant amount of time that would safeguard your sexual health for many years to come. Any unusual findings should be immediately reported to your doctor.