A stimulation aid includes a housing (8) adapted for retaining against the surface of an individual, the housing having associated therewith retention elements (9) for securing the housing relative to the individual, a power source, drive element and a driven member (11), the driven member being supported for oscillatory motion relative to the housing and, in use, the power source being operable to supply power to the drive element whereby the drive element effects oscillatory motion (x-x) of the driven member.