الخد والورد
The cheek and the rose.
Both can be seen. In “the cheek resembles a rose,” the point of likeness might be redness, freshness, or beauty, depending on the context. Sensory classification of the terms does not imply identity in every respect.
Human skin and rose petals are different things. A simile selects one relevant feature without equating their natures. The same distinction applies throughout the remaining sensory examples.