That's a good one! Thanks for posting it!
It's quite a common advertising technique actually. Used today, used 100 years ago, it
always works the same:
Throw together some seemingly unrelated oddball
images or sounds (in radio and tv commercials).
It catches the recipient off guard and gets their attention.
Then, next time they see these images or hear
these sounds they will think of the product
being advertised.
Tree stump, donkey, hammock, cherub...
see those and think "Edison cylinders"
Chuck