Our offspring receive no physical characteristics that are identical to ours. They are a blend of two different people. A child may have eyes similar to his mother's and a nose like his father's. Why, of all things, are we so obsessed with the notion that the rarely exposed genitals of a father and son must be exactly the same? Until a little boy reaches puberty, this is impossible to achieve anyway. The absence of pubic hair will be just as noticeable, if not more so, than the presence of a foreskin.
If a boy notices pubic hair or skin missing from his father's penis, each peculiarity can be explained in a way he’ll understand. Do we manage to simplify why our son's and daughter's genital features are not alike? Certainly. Likewise, we can easily clarify any distinctions between father and son.
If the need arises, parents who chose to keep their son intact can easily explain why he has something his circumcised father does not. "Daddy [and/or your brother] had the foreskin removed in an operation because doctors used to think it was unhealthy. It is actually healthy and necessary, so we chose to leave your natural body alone." – taken from: