Girls, do you purposely get stern & on point when having to interact with unattractive guys?

I've noticed that when I frequently shop at the same stores I notice that half of the gals & a very few guys tend to very stern, serious, cold when making a transaction

One gal in particular did this with me strictly

(cold, serious, stern, annoyed, on a rush) but was "cheery" with everyone else & talkitive

Girls, do you purposely get stern & on point when having to interact with unattractive guys?
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