Why do cow wear bells .......???? Because their don't work :D :P
Because those men have got Stable jobs.
The same way he solved all other problems: He worked it out with a pencil and paper.
An investigator.
If she's only wearing one sock. (This joke brought to you courtesy the homeless guy outside my local 7-11.) Edit: tweaked the punchline.
Because there horns don't work
A humdinger.