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