<human>:  Why is the word ‘erotic’ spelled with an ‘o’?
<bot>: The word erotica is derived from the Greek word erotos, which means “sensual.” The “o” is a grammatical convention that is used to indicate that the word is a noun. In this case, the word erotica is a noun that refers to a type of literature or art that is focused on the sensual aspects of human sexuality.