Not likely the cause since most everyone is a nose breather. You probably just have a great sense of smell...you could train yourself and get a job as a scent tester.
well up until 6th grade, i was a total mouth breather. i had to train myself to breathe through my nose. the kids would laugh and say mean things.
*cries in corner*
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Do you know people? Have you interacted with them? Because this is pretty standard no-brainer stuff. -33girl