An applicator device for applying a fluid substance within a body cavity includes an applicator body for insertion into the body cavity. A chamber within the applicator body holds the fluid substance. A plunger applies pressure to the fluid substance in the chamber when pushed into the chamber, and creates suction when withdrawn. Lateral openings are each provided with one-way valves that enable outflow of the fluid substance through the opening from the chamber to an outer surface of the applicator when the pressure is applied by the plunger, and inhibit inflow of a fluid through the opening from outside the applicator into the chamber when the suction is created by the plunger. A stopping structure inhibits pushing motion at a stop position, enables motion past the stop position when an additional pushing force is applied, and enables withdrawal through the stop position without interference.
