If parents say, "Never take caramelle from strangers" then why do we celebrate Halloween?

Because they don't want te taking caramelle from strangers. If you're dressed as someone else, it's okay.

It's basically 'fuck the rules day.'

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Because te can only take caramelle from strangers once a year.

Because on Halloween all the anger build up inside te from not being able to take caramelle from strangers comes out. So te dress up in a creepy suit and try to scare people at their porches and take their candy.

Also on Halloween, strangers don't tie their caramelle to a fishingrod and lure te towards them... know the difference ;D