@Aethelflaed From the Oxford American Dictionary:
fetish (noun)
• an inanimate object worshipped for its supposed magical powers or because it is considered to be inhabited by a spirit.
• a course of action to which one has an excessive and irrational commitment : he had a fetish for writing more opinions each year than any other justice.
• a form of sexual desire in which gratification is linked to an abnormal degree to a particular object, item of clothing, part of the body, etc. : Victorian men developed fetishes focusing on feet, shoes, and boots.
I suppose you are probably thinking of a particular medical definition and assuming that it is the only proper one. It is a word with a rather wide range of colloquial uses, however, and they are all correct. So technically, you are not being nitpicky at all. You are insisting that everyone conform to your idiolect.
In any case, the word I used in the title was not “fetish,” but rather “kink.” From the same dictionary:
kinky (noun)
• involving or given to unusual sexual preferences or behavior
• (of clothing) sexually provocative in an unusual way : kinky underwear.
• having kinks or twists : long and kinky hair.
While freckles are not unpopular, they are not exactly a typical sexual preference either. Perhaps that points to a way of answering the question. Regardless, the question does not seem to be linguistically irredeemable even if I did not word it in precisely the way you would have had it been your question rather than mine.