An implantable penile prosthetic comprising: an inflatable member that is sized for implantation into a penis of a user; a reservoir that is implantable in an abdomen, the reservoir is configured to contain liquid useful in inflating the inflatable member; and a pump that is intraoperatively attachable between the inflatable member and the reservoir, the pump configured to communicate with the inflatable member and the reservoir and sized for implantation into a scrotum, the pump including a pump bulb comprising: a first end section and a second end section, each of the first end section and the second end section formed as a portion of a sphere; a mid-section extending between the first end section and the second end section, with the mid-section forming a plane when seen in longitudinal cross-section of the pump bulb and forming an arc when seen in lateral cross-section of the pump bulb and characterized in: a first concave portion extending between a first apex located in the first end section and a second apex located in the second end section and a second concave portion separate from the first concave portion, the second concave portion extending between a third apex located in the first end section and a fourth apex located in the second end section, wherein the mid-section comprises a first arc-shaped segment and a second arc-shaped segment, each of the first and the second arc-shaped segment (55, 57) extending between the first concave portion and the second concave portion. an inflatable member that is sized for implantation into a penis of a user; a reservoir that is implantable in an abdomen, the reservoir is configured to contain liquid useful in inflating the inflatable member; and a pump that is intraoperatively attachable between the inflatable member and the reservoir, the pump configured to communicate with the inflatable member and the reservoir and sized for implantation into a scrotum, the pump including a pump bulb comprising: a first end section and a second end section, each of the first end section and the second end section formed as a portion of a sphere; a mid-section extending between the first end section and the second end section, with the mid-section forming a plane when seen in longitudinal cross-section of the pump bulb and forming an arc when seen in lateral cross-section of the pump bulb and characterized in: a first concave portion extending between a first apex located in the first end section and a second apex located in the second end section and a second concave portion separate from the first concave portion, the second concave portion extending between a third apex located in the first end section and a fourth apex located in the second end section, wherein the mid-section comprises a first arc-shaped segment and a second arc-shaped segment, each of the first and the second arc-shaped segment (55, 57) extending between the first concave portion and the second concave portion. a first end section and a second end section, each of the first end section and the second end section formed as a portion of a sphere; a mid-section extending between the first end section and the second end section, with the mid-section forming a plane when seen in longitudinal cross-section of the pump bulb and forming an arc when seen in lateral cross-section of the pump bulb and characterized in: a first concave portion extending between a first apex located in the first end section and a second apex located in the second end section and a second concave portion separate from the first concave portion, the second concave portion extending between a third apex located in the first end section and a fourth apex located in the second end section, wherein the mid-section comprises a first arc-shaped segment and a second arc-shaped segment, each of the first and the second arc-shaped segment (55, 57) extending between the first concave portion and the second concave portion. a first concave portion extending between a first apex located in the first end section and a second apex located in the second end section and a second concave portion separate from the first concave portion, the second concave portion extending between a third apex located in the first end section and a fourth apex located in the second end section, wherein the mid-section comprises a first arc-shaped segment and a second arc-shaped segment, each of the first and the second arc-shaped segment (55, 57) extending between the first concave portion and the second concave portion.