Answer:
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
What eight letter word has "kst" in middle, in the beginning and at the end?
What word of five letters has only one left when two letters are removed?
What goes trough your head but you forget it like 3 days after?
The more you take, the more you leave behind. What are they?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?