What's your reaction gonna be if you find someone hitting on your significant other?

If you find someone hitting on your significant other by either approaching them or checking them out, how are you gonna react? Would you act possesive and confront them? Or just walk away from the spot?

Or if have you been in such a situation already, what was your reaction?

Whats your reaction gonna be if you find someone hitting on your significant other?
What's your reaction gonna be if you find someone hitting on your significant other?
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