His promotion of developing anaphrodisiac foods was based on these beliefs. It also acts as an anaphrodisiac that prevents other males from mating with the female. Spermatophores contain nonfertile sperm (apyrene) to increase the anaphrodisiac effect. For this reason alcohol is considered an anaphrodisiac. An anaphrodisiac (also antaphrodisiac or antiaphrodisiac) is a substance that quells or blunts the libido. In ancient times, it was believed to be an anaphrodisiac, hence the name "chaste tree". Tobacco has also been described an anaphrodisiac due to its propensity for causing erectile dysfunction.