I am 18 years old and my brother is 15 my mom said we had to have physicals so she made the appointments,they were for the same day, when we got to the medical centre the nurse said as we were brothers we could have our physicals together we were told to strip to our underwear, the doctor came in,did all the normal checks, then told us to drop our undies, it was then I was totally embarrassed as we both stood there I could see my younger brother was way bigger than me by at least two inches and thicker too in the penis department,his balls were also way bigger, he was obviously more advanced in puberty than me51