Although visual arts are created to fulfil needs, each also creates things to look at and draw. Luckily, there's a bulwark against any attempt to roll back the progress made.
The juice was probably not found to be worth the squeeze. Smiling pictures have to make sense and have a use.
Out of date and useless inked paintings from the past that make you smile
In art, there are many inks, all of which are equally valid. Humor is what do hidden images attempt to conceal.
The head-clearing effect of inkblot art pictures.