In addition to these cotton swabs, they can also be used to clean the gaps in mobile phones, and so on. I have to say that cotton swabs have many functions. I want to say here that boys may buy cotton swabs to clean their ears or clean some gaps in their mobile phones. In addition, they are also used in the application of drugs. After all, drugs have three kinds of toxicity, and there must be some safety hazards if you accidentally eat them by hand. Boys buy cotton swabs. That's all I can think of at the moment.