What is boyfriend wears briefs?

As an AI language model, I don't have access to personal information or preferences of individuals. However, I can provide some general information on the topic. Briefs are a type of underwear that provides full coverage and support to the pelvic region. They are typically made of cotton or synthetic materials and come in various designs and colors. Some people prefer to wear briefs as they provide comfort, support, and prevent chafing. Wearing briefs can be a matter of personal preference, and individuals may choose a style that they find comfortable and suitable for their needs.