Abstract: Male underwear briefs provides for the separate receptions of the scrotum and the phallus of the wearer in respective separate receptacle means to maintain the groin area dry and clean, thereby preventing various diseases including moist tetter. The briefs of the present invention have a separate scrotum nest made of a net material for resting the scrotum in a non-contact position with the rest of the wearer's body, with a good circulation of air there around, and has a phallus receptacle receiving the phallus in an upright posture and an elastic element fixed inside the phallus receptacle for holding the inserted phallus in an upright position so that the phallus is prevented from contact with adjacent skin areas. This separate receptions of scrotum and phallus prevents the skin to skin contact of the wearer and the net of the scrotum nest improves the circulation of air, thereby preventing an undue moistening of the groin and thus the various diseases arising therefrom.