Rimjobs are a type of adult modelling that involves posing in a sexual manner for an audience. They typically involve the model wearing lingerie or other revealing clothing while engaging in sexual activities with another person or solo. The focus is placed on the model's buttocks, which is often massaged, licked, and/or penetrated. It is a popular form of adult modelling as it allows for a wide range of creative expression and can be both exciting and erotic to watch.