Underwear adapted to add an inner structure to a traditional covering comprising waistband and fabric panels conventionally covering the buttocks, hips, and genital areas. The inner structure may include a fabric panel bearing a ridge intended to occupy the cleft separating the buttocks, with the fabric panel adhering closely to the buttocks. The inner structure may also or instead include a fabric scrotum guard which covers the rear of the scrotum and which separates the scrotum from the inner thighs and separates the right and left perineal folds where inner thighs meet the lowermost trunk. The scrotum guard may include adjustment structure for adjusting tightness of the fit with the Y formed at the scrotum and the entire perineum. The front of the traditional covering may have an opening for retrieving the penis which opening is arranged horizontally rather than in the traditional generally vertical orientation.