A penile insert device effective to prevent retraction of the penis and to increase the length of a penis in its flaccid or erect state. An elongated body of the penile insert device can have a proximal end, a distal end, a first side edge, a second side edge, a top surface, and a bottom surface. Each of the first and second side edges is formed by a plurality of alternating lateral plateaus and lateral valleys. The lateral plateaus are smoothly connected to adjacent lateral plateaus by the lateral valleys. The lateral valleys of the first side edge is staggered with respect to the lateral valleys of the second side edge such that the lateral plateaus and valleys of the first lateral side and the lateral plateaus and valleys of the second side edge form a zigzag pattern in the body.
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