A method of implanting a penile prosthetic in treating erectile dysfunction is described. The method includes providing a pump having a pump bulb including a mid-section having a first face that is planar in longitudinal cross-section and a second face that is concave and arced in longitudinal cross-section. The method includes implanting an inflatable member into a penis； implanting a reservoir into an abdomen； intraoperatively coupling the pump between the inflatable member and the reservoir； and implanting the pump in a scrotum.
