What metaphors are used in The Erotic Poems by Ovid?

In Book Three, the author discusses the matter of keeping a lover rather than finding and conquering them. Included in the poetry devoted to this purpose are affirmations and declarations made to the god of love, Cupid. The metaphor continues when the following section of poetry is Ovid acting as the guiding father to younger men. He warns them away from relying solely upon their looks as these will fade.