Theory:

Once there was a talking fan —
Electrical his chatter.
I couldn’t quite hear what he said
And I hope it doesn’t matter
Because one day somebody oiled
His little whirling motor
And all the mystery was spoiled —
He ran as still as water.
 
                                          ~ MAUDE RUBIN
Reference:
National Council of Educational Research and Training (2007). Honeycomb. Mystery of the Talking Fan: Maude Rubin (pp. 97-98 ). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.