I think you may check them for a growing hormone, sometimes when you have a problem with the pineal gland, certain parts of the body, could grow to extrems, you may check Daddy too, but this maybe normal. Some races are like you stated, but you can find things like that in all groups. did you every heard Acromegaly? you cant see that very often in children but better be safe than sorry.The longest recorded erected penis was 14 inches medically documented. So I find that hard to believe those 20 inches story. Sorry but I cant buy that.