The suction cup (Figure 4.54) is a common device used to suspend pictures, plants, and other objects

Question:

The “suction cup” (Figure 4.54) is a common device used to suspend pictures, plants, and other objects from walls, ceilings, windows, and other smooth surfaces. Why is the name “suction cup” a bit of a misnomer? Is anything really “sucking”? How exactly does a “suction cup” work? Explain.