{HEAD ~ The sheath} has {TAIL ~ an open proximal end} for receiving the male genital member and a distal end that has a distal tip that is selectively closed 
{ HEAD ~ The sheath } has { TAIL ~ an open proximal end } for receiving the male genital member and a distal end that has a distal tip that is selectively closed
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH