Lets be straight (in the cut to the point sense): I'm lacking my right testicle because of a tumor. I was lucky enough to find it at an early stage and get the surgery done quickly. Even chemotherapy was unnecessary!
I notice the tumor myself, so the doctor scrutiny of my intimate part was pretty straight forward and the result was as expected. The cough part I supose is a joke... as to this exam concerns.
The thing is: had the doctor found something, you perception would be completely different.

Now, if don't feel comfortable with this doctor, you may want to try another. You need to trust you physician. It's a serious thing.