Knowing your body well has great advantages in detecting illnesses and diseases early, this includes testicular cancer. From jerking off, to shower time, getting to know your balls is one of the best things you can do for your health.
We all want to be safe within our person. To be free from violence and physical aggression. For most of us, this includes our sexual life. A potentially dangerous activity can take many shapes and forms, depending on the participants, but when communication and agreeance aren't involved, harm and even death can result.