General Noise.

[Rai]

Bitter? I don't have that much taste in bitter beyond simple black coffee.

What does one man build but never use.
The man who buys it doesn't use it either, and
the man who does use it doesn't know he's using it.

.... I have no clue, whatsoever. Sorry about that but I'm no good at riddles. Dx

[LadyWarrior]

The second most recognized smell is Chocolate.

What does one man build but never use.
The man who buys it doesn't use it either, and
the man who does use it doesn't know he's using it.

I know the answer, so I can't say anything, but here is a hint:
Until modern times, the item was usually built out of pine wood.

[Prime Administrator]

Chinese "Call of Duty" game pits players (as Chinese soldiers) against US troops.
I don't think it would matter much if it weren't being used to train PLA soldiers.



Here's the WIRED story on it:

http://www.wired.com/dangerroom/2011...itary-shooter/