Abstract: A 1-piece, non-surgical penile prosthesis (FIG. 1) molded of a biocompatible plastic comprising a specially designed, semi-rigid, rounded oblong tip (8) for retention in the fossa navicularis; a semi-rigid, narrow neck (10); a semi-rigid body (12); a semi-rigid taper (14); and a flexible tail (16, 18). The prosthesis (FIG. 1) is lightly lubricated for complete insertion into the male urethra. It is designed to aid males suffering from the common forms of erectile dysfunction. In use, the prosthesis (FIG. 1) is completely invisible and penetration is immediately possible. It comes with a 1-piece, semi-rigid practice device (FIG. 3) made of biocompatible plastic, which practice device is used for the training of male meatal dilation preparatory to using the prosthesis (FIG. 1). The practice device (FIG. 3) also provides the user with the preliminary experience of lubrication, insertion, removal, and the acquisition of skill and confidence in the form and use of the prosthesis (FIG. 1).