The invention relates to a device for sexual stimulation of a penis, with a housing with a substantially cylindrical cavity, a number of constriction elements with an opening which are placed in the housing and arranged adjacently of each other in axial direction, wherein the cavity extends through each of the openings and the constriction elements are each configured, when activated, to constrict their opening, and a control element placed in the housing for controlling the controllable size of the opening of each of the constriction elements, wherein the control element is configured to generate at least one reciprocally moving constriction of the constriction elements displacing over the length of the cavity along the constriction elements, at a frequency of between 0.2 and 5 reciprocal movements per second. The invention also relates to an apparatus for use by a sexual partner of the user of the device, which is configured for placing in the vagina of the sexual partner and provided with a number of pressure sensors and elongate sensor configured to detect the extent to which the apparatus has been inserted into the vagina.
