An aphrodisiac is a drug (or something else) that puts people in the mood for sex.
Anything described as aphrodisiac gets folks ready for sex. In some cases, that could be a drug. Other people find candles, music, or even dimming the lights to be aphrodisiacs. Food is considered a major aphrodisiac by many people, and there are several foods like oysters and chocolate that are thought to have an aphrodisiac effect. When you see aphrodisiac, think sexual.