Answer by Anon User:

Definitely not strange or unnatural.  Preference in breast size varies with time and culture.

When I was a kid I found my grandfather’s stash of 1930’s porn, including a number of issues of Snappy Magazine.  It was a monthly periodical of erotic stories and illustrations.  One of the recurring themes was the hero throwing over his big-breasted babushka from from old country for some waspy gamine.  Having grown-up with Playboy’s barbie dolls, I was surprised to realize that they weren’t always what stoked men’s fantasies.

Also, google the art work of Enoch Bolles.  He was a pin-up illustrator for Snappy and other pulp magazines in the 20s and 30s.  You won’t find anything bigger than a C cup in any of his work.
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