Wonderful idea, Fetishdj!

I believe that by nature children have the same general interests as their parents - It's only natural.
Sexual interest(s), being one of the most primal, is bound to be at least based upon predefined "settings".

That's not to say that there will not be differences based upon life experiences, but that's just my two cents.
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However, mine do not know. I don't think I'd ever have a reason to tell them anyway.

-Vic