An assembly for applying a tension ring to a penis includes an elongate base having a top and a flange just below the top. An applicator is releasably coupled to the top of the base. The applicator has a projecting tab which is smaller than the diameter of the tension ring. The applicator and the base cooperate to define a channel between the tab and the flange which is sized to receive the tension ring. A user can easily apply the tension ring over the tab and then stretch the tension ring over the entire applicator into the channel, whereupon the applicator is moved off the base and onto an erect penis so that the tension ring can be moved from the applicator onto the penis.