Size, that includes penis size, is a event of inheritance. It is totally viable for a dwarf to enjoy what you would consider to be a "normal" sized penis. I wouldn't verbs roughly speaking it. I'm sure he will get your sister proud. Preoccupation beside the size of his penis may also breed him self-couscious. I know that isn't the aim, but freshly engender sure everyone is mean. Kids pick up on the darndest things, and they are incredibly understanding, regardless of age.
Yes, obviously they do!
Why not ask your sister, in recent times to be sure, if you are that curious.
Certainly you can believe your own sister.