I have heard of women giving themselves breast exams to check for cancer, and wonder if there is a way for men to check for testicular cancer. I heard that it is the most common form of cancer in young men, and I'm worried about it.
Testicular cancer, while it is the most common form of solid tumor in men between the ages of 15 and 35, is still pretty rare. Cancer is not terribly common among young men in general. This is a difficult cancer to treat, with a low survival rate, but the odds are best the earlier it is discovered. So, doing regular self-examinations is a good idea.
It's pretty simple, really. Sometime when the scrotum is relaxed, such as after a hot shower, place two fingers under a testicle, with the thumb on top. Roll each testicle around, and feel its shape. It should be firm, with a little give, and sort of football shaped. What you are feeling for is unusual bumps, lumps, or hard spots. The first time you do this, you may feel all sorts of lumpiness. This might be perfectly normal for you. What you are looking for is changes. If you are concerned, see a urologist for reassurance. Not all lumps are cancer, but they should all be investigated.
Some guys feel sort of weird doing this. If you do, you can probably find some helpful woman to do the exams for you.