What is an ear piercing gun used for?

An ear piercing gun is specifically designed for the purpose of creating a hole in the earlobe so that earrings can be inserted. It utilizes a spring-loaded mechanism to drive a sterile earring through the earlobe quickly and efficiently, making it a popular choice in many retail environments for ears piercing. This method is widely utilized due to its speed and convenience, allowing for relatively quick healing if proper aftercare is followed.

The other options, while related to ear care, do not accurately describe the primary function of an ear piercing gun. For instance, removing earwax, testing ear sensitivity, or cleaning ear piercings are unrelated activities that do not involve piercing the ear itself. Therefore, the focus of the ear piercing gun remains solely on piercing the lobe, making it the correct answer.