Stimulation device

FIG. 1 is a perspective view of a stimulation device showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is the top plan view thereof; and,

FIG. 7 is the bottom plan view thereof.

The broken lines in the drawings depict portions of the stimulation device that form no part of the claimed design.