Simpson and Son Revitalizing Tonic is an aphrodisiac sold by Grampa and Homer. The tonic was purportedly first developed by Grampa's great-grandfather when he was trying to develop a cheap substitute for holy water. Grampa makes the tonic by mixing a variety of bottles kept in his bathroom cabinet, which appear to include several types of medicine/ointments/colognes. After being stirred together, the tonic has a brownish-red color. When consumed, the tonic takes effect rapidly, after only a few seconds. While the effects on women have yet to be shown, in men it quickly triggers a state of sexual arousal that leads to increased sexual performance which can even lead to euphoric memory loss (as in the case of Homer's first use of the tonic).