Answer:
How far will a blind dog walk into a forest?
The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?
What has a big mouth, yet never speaks?
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
How do you know if a sniper likes you?