Riddle - 10 points for the first correct answer?!

Question: Riddle - 10 points for the first correct answer!?

everyone and everything has one - thoe not always seen,
im often used to scare - but im never there to scare
WAT AM IWww@Enter-QA@Com

Answers:

shadow or ghostWww@Enter-QA@Com

voice, sphincter, deadly virus!?Www@Enter-QA@Com

heart!?
Bones!?
Www@Enter-QA@Com

A shadowWww@Enter-QA@Com

A man's junk!Www@Enter-QA@Com

there can be only 1 answer and its shadowWww@Enter-QA@Com

the truth!?
Www@Enter-QA@Com

No idea!. Blood!?Www@Enter-QA@Com

This can have alot of answers!.

Voice
Shadow
MindWww@Enter-QA@Com

a secretWww@Enter-QA@Com

brainWww@Enter-QA@Com

your voice!.!.!.!.!.!.!?Www@Enter-QA@Com

a ghost, or its spirit!?Www@Enter-QA@Com

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