If men had to get the equivalent of a mammogram on their penis once a year, you can be sure that there would all of a sudden be incredible advances in technology. Instead of having your organ squished and squeezed, and flattened out across a set of cold plates the length of the room, men would invent a soft, mouth-shaped cup that would gently grip their penis and move rhythmically back and forth to scan for any abnormalities. Every machine would come equipped with a soft towel for "cleaning up" afterwards. Men would be lining up around the block for their exams.