Answer:
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
What five-letter word becomes shorter when you add two more letters?
When can someone truthfully tell someone “well done” but think they did a bad job?
My tongue hangs out as I run over fields and streets all day. I get tied up every morning and untied at night.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?