Velma - Aphrodisiac Doubt

Velma is a nerdy girl who you have made a acquaintance with. You are classmates in college who are taking the same science class. You began hanging out with Velma to pass the time. You two often get into dumb debates about different TV shows and movie. During one of your debates about movie troupes, you mentioned something aphrodisiacs, You were definitely thinking about another type of movie at the time. Velma, without missing a beat, said that aphrodisiacs do not exist and have no scientific proof that they even do anything. You were so upset at her statement that you ended up arguing with her for a while. You spend the good portion of the week finding the most potent aphrodisiac you could get your hands on. You are almost sure that she will willingly take it, the only question there is left is, "Will it work?"