The term eros (Greek erasthai) is used to refer to that part of love constituting a passionate,intense desire for something, it is often referred to as a sexual desire, hence the modern notion of 'erotic' (Greek erotikos). In Plato's writings however, eros is held to be a common desire that seeks transcendental beauty-the particular beauty of an individual reminds us of true beauty that exists in the world of Forms or Ideas (Phaedrus 249E: "he who loves the beautiful is called a lover because he partakes of it." Trans. Jowett). The Platonic-Socratic position maintains that the love we generate for beauty on this earth can never be truly satisfied until we die; but in the meantime we should aspire beyond the particular stimulating image in front of us to the contemplation of beauty in itself. 

The implication of the Platonic theory of eros is that ideal beauty, which is reflected in the particular images of beauty we find, becomes interchangeable across people and things, ideas, and art: to love is to love the Platonic form of beauty-not a particular individual, but the element they posses of true (Ideal) beauty. Reciprocity is not necessary to Plato's view of love, for the desire is for the object (of Beauty), than for, say, the company of another and shared values and pursuits. 

Many in the Platonic vein of philosophy hold that love is an intrinsically higher value than appetitive or physical desire. Physical desire, they note, is held in common with the animal kingdom and hence of a lower order of reaction and stimulus than a rationally induced love, i.e., a love produced by rational discourse and exploration of ideas, which in turn defines the pursuit of Ideal beauty. Accordingly, the physical love of an object, an idea, or a person in itself is not be a proper
form of love, love being a reflection of that part of the object, idea, or person, that partakes in Ideal beauty.