428-429. Missing parts

There once was a blind man named Lake,
Whose eyeballs were totally fake.
Still, he was quite deft
At finding the cleft
Of a girl with his old one-eyed snake.

A crusty old sergeant named Sam,
Lost his dick over in Viet Nam.
'Twas caused by a Ho
(It was not Chi Minh, though)
With a badly-diseased bearded clam.