Why are girls nicer to other girls who hit on them than guys even if they are straight?

I saw this girl hit on another girl today and the one who was getting asked out was so nice about it letting her know how flattered she was but that she’s straight.

why are they so much nicer to other women who approach them compared to if a dude went up to them?

Why are girls nicer to other girls who hit on them than guys even if they are straight?
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