In Plautus’ Mercator, the senex amator Demipho lusts after the slave girl Pasicompsa, who is the lover of his son Charinus. Demipho knows nothing about their relationship. He believes that Charinus bought Pasicompsa as a present for his mother while he was trading on Rhodes. In an attempt to gain access to her, Demipho enlists the aid of his elderly neighbour, Lysimachus, who taunts him for his infatuation with such a young woman. Eager to persuade Lysimachus that he is truly in love, Demipho offers to let him cut off his head, finger, ear, nose or lip, or even kill him with love if he is lying about his feelings (308–10):
decide collum stanti si falsum loquor;
uel, ut scias me amare, cape cultrum, [ac] seca
digitum uel aurem uel tu nasum uel labrum:
si mouero me seu secari sensero,
Lysimache, auctor sum ut me amando enices.
This hitherto unrecognized list of penalties for adultery not only sheds light on the nature of Charinus’ relationship with Pasicompsa, but also emphasizes the inappropriateness of Demipho's desire for her.