14 year olds dick. How big should a 14 year olds penis be Normal? Under-arm and pubic hair start at about the same time as the testes start to grow, but the whole process isn't complete for years. Domande correlate How big should a 14 year olds penis be? What Causes Morning Wood? About 10 percent of the men admitted to being teased about the appearance of their penis, while 47 percent recall witnessing teasing by others. With that being said, many parents will want to schedule an appointment with the family doctor if their son's penis hasn't started to grow after the appearance of body and facial hair. Age 10 to Less commonly, there are congenital conditions that limit how much of the penis is externally seen. Body image. By using Verywell Family, you accept our.