In addition to political invective, cross-dressing appears in Roman literature and art as a mythological trope (as in the story of Hercules and Omphale exchanging roles and attire), religious investiture, and rarely or ambiguously as transvestic fetishism. A section of the "Digest" by Ulpian categorizes Roman clothing on the basis of who may appropriately wear it; a man who wore women's clothes, Ulpian notes, would risk making himself the object of scorn. A fragment from the playwright Accius (170–86 BC) seems to refer to a father who secretly wore "virgin's finery". An instance of transvestism is noted in a legal case, in which "a certain senator accustomed to wear women's evening clothes" was disposing of the garments in his will. In a "mock trial" exercise presented by the elder Seneca, a young man "(adulescens)" is gang-raped while wearing women's clothes in public, but his attire is explained as his acting on a dare by his friends, not as a choice based on gender identity or the pursuit of erotic pleasure.