Get rid of the "gun" analogy in the FAQ

I don't really like Gun analogy here. I think we can do without it. I have made some edits, you can use them or I am sure community can come up with other positive analogies.
Thanks for the note. English is not my first language so I need all the help I can get :-) I changed as par your suggestion but then went on to change the writeup even more to keep the original wordings and also included a helpful link. Thanks again.