Yes. Testicular cancer is most common in males between 15-29 years. Everyone who has testicles should know what their testicles normally feel like. Many people find cancer by noticing a change in one or both testicles. The best time to feel the testicles is just after a warm bath or shower. The heat from the water makes the scrotum relaxed and the testicles descend more so they are easier to feel. It is recommended to check your testicles (do a self-exam) monthly and to see your doctor right away if you think you notice a change.