An aphrodisiac is something that is supposed to make people feel horny or attracted to each other. Some people believe that things like oysters or chocolate can make you more in the mood for sex. But there is no surefire way to make someone feel this way, and it is important to remember that everyone is different and might not react the same way to the same things. Basically, it's like trying to make your brain and body feel happy and tingly so you want to cuddle or do other grown-up things with people you like.