Guys, what's the best way to turn a guy down?

Anonymous
I always hear guys dogging on girls who reject them. I personally have been cussed out for it, even when I tried to be really polite.

So I want this for the future so I can piss off as few men as possible: guys, what is the best way to let a guy down? How can a girl reject a guy without totally destroying his ego?
Guys, what's the best way to turn a guy down?
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