If a child, teen, or adult continuously engages in socially incorrect behaviors, such as nose picking in public, there is a chance that the person might actually have an underlying "high-functioning" developmental disorder, such as Asperger's Autism. People with high-functioning autistic disorders are typically of average or genius intelligence, appear normal, but have trouble understanding/remembering "normal" social behavior. You should comment on this in your response, as aspie-autistics left undiagnosed until adulthood have "extremely" painful childhoods due to a lack of appropriate care and support.