The Day’s Dreams

No longer advantageous, we are lost.
But who are we, who were advantageous?
The nightmare is an emotional choice

In how to interpret the random dream.
You can train it to interrupt itself
By playing a neutral piano chord

While thinking happy thoughts before bedtime
And then every time you start REM.
The latter entails some kind of headset.

Presumably, a torturer could choose
To do the reverse—play the chord for you
During a brutal interrogation

And then again whenever you began
To dream. Nightmare! At your service. We are
Useless, who you once thought advantageous.