Well, for starters I think cut penises are more common in the US anyway. If you make realistic, you make it what your customers are 'realistically' used to.

And I think it'd probably be hard to make foreskin, too.

And yes, I probably would buy an 'uncut dildo' if there was such a thing that was done well.

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You know, Blackadder, for me socks are like sex. Tons of it about and I never seem to get any.

My Photos:
https://imgur.com/a/80hiRdm