In the Company of Clowns

Clowns,
While having fun,
Are also sad.
This everybody knows.
What about mass murderers,
And sociopaths?
What is it with them?
Have they fun at work,
And sadness overcomes them afterwards?

Or is it the other way round,
Asks the clown with the square nose,
And the tin can on his head.
Are they sad and miserable,
When doing their business,
And do they elate afterwards,
When they are alone,
Cackling with glee over their deeds?

This is a mystery,
And cannot be solved,
Says the white clown.