A sexual stimulation device has a housing and an exposed sexual organ contact surface supported by the housing. The housing defines an elongated internal cavity having a longitudinal axis extending away from the contact surface. The device also includes a mass laterally constrained within and movable linearly along the cavity, and an electrically driven actuator disposed within the housing and operable to accelerate the mass along the axis of the cavity, thereby oscillating the contact surface in a linear motion along the longitudinal axis.
