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Well I'm an identical twin and i have to say i don't know. :P

My twin may be one of my best friends but I don't want to see his penis lol

Apparently enviromental factors can change things. (Food and minerals intake throughout life) :)

Although i can guess they'll be near enough the same size, considering me and my twin have discussed this topic.

Twins on the otherhand would have different sizes as they are practically different people. :D

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Skylar Hagenes

Lvl 13
3y ago

What else can I help you with?