A little known Phenomenon may just be as simple as surface tension. Merriam Webster Dictionary definition of Surface Tension...
attractive force exerted upon the surface molecules of a liquid by the
molecules beneath that tends to draw the surface molecules into the bulk
of the liquid and makes the liquid assume the shape having the least
A joke isn't funny without an element of truth. Isn't the PENMEN Comic Strip smart? hahaha
Penman demonstrates this black and white phenomenon with pen and ink using sequential art.