Abstract: A friction-based therapeutic light penile device is configured to provide light therapy to the penis when in an erect state to more effectively ensure penetration of the emitted therapeutic light into the penis as the skin tissue is thinner. The device forms a sleeve for insertion of the erect penis and a friction material for arousal to maintain the erection during therapy. The light devices may be configured proximal to an outer rigid shell and emit light through an elastomeric friction material. The light devices may be configured to heat the friction material for further arousal and a vibratory device may further enhance arousal. The therapeutic light may be a specific wavelength of light, such as a blue, red and/or infrared. A testicular flange may extend from the sleeve and have light devices for the scrotum and testicles. The elastomeric material may form an insertion flange that is vagina shaped.