Answer:
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
A horrid monster hides from the day, with many legs and many eyes. With silver chains it catches prey. And eats it all before it dies. Yet in every cottage does it stay. And every castle beneath the sky.
What is always coming but never arrives?