seen as far more sexually explicit in his poetry than the other elegists. His erotic elegy covers a wide spectrum of themes and viewpoints; the Amores focus on Ovid's relationship with Corinna, the love of mythical characters is the subject of the Heroides, and the Ars Amatoria and the other didactic love poems provide a handbook for relationships and seduction from a (mock-)"scientific" viewpoint. In his treatment of elegy, scholars have traced the influence of rhetorical education in his enumeration, in his effects of surprise, and in his transitional devices. Some commentators have also noted the influence of Ovid's interest in love elegy in his other works, such as the Fasti, and have distinguished his "elegiac" style from his "epic" style. Richard Heinze in his famous Ovids elegische Erzählung (1919) delineated the distinction between Ovid's styles by comparing the Fasti and Metamorphoses versions of the same legends, such as the treatment of the Ceres–Proserpina story in both poems. Heinze demonstrated that, "whereas in the elegiac poems a sentimental and tender tone prevails, the hexameter narrative is characterized by an emphasis on solemnity and awe..." His general line of argument has been accepted by Brooks Otis, who wrote: Otis wrote that in the Ovidian poems of love, he "was burlesquing an old theme rather than inventing a new one". Otis states that the Heroides are more serious and, though some of them are "quite different from anything Ovid had done before [...] he is here also treading a very well-worn path" to relate that the motif of females abandoned by or separated from their men was a "stock motif of Hellenistic and neoteric poetry (the classic example for us is, of course, Catullus 66)". Otis also states that Phaedra and Medea, Dido and Hermione (also present in the poem) "are clever re-touchings of Euripides and Vergil". Some scholars, such as Kenney and Clausen, have compared Ovid with Virgil. According to them, Virgil was ambiguous and ambivalent while Ovid was defined and, while Ovid wrote only what he could express, Virgil wrote for the use of language. Legacy Criticism Ovid's works have been interpreted in various ways over the centuries with attitudes that depended on the social, religious and literary contexts of different times. It is known that since his own lifetime, he was already famous and criticized. In the Remedia Amoris, Ovid reports criticism from people who considered his books insolent.