Feet: A biblical euphemism for genitals

When Saul went into a cave to urinate or defecate he went in to "cover his feet."

And he came to the sheepcotes by the way, where was a cave; and Saul went in to cover his feet. 1 Samuel 24:3

When a baby is born it comes out between the mother's "feet"

And toward her young one that cometh out from between her feet. Deuteronomy 28:57

Ruth (with coaching from her mother-in-law Naomi) uncovers Boaz's "feet"

And it shall be, when he lieth down, that thou shalt mark the place where he shall lie, and thou shalt go in, and uncover his feet, and lay thee down; and he will tell thee what thou shalt do. Ruth 3:3

And when Boaz had eaten and drunk, and his heart was merry, he went to lie down at the end of the heap of corn: and she came softly, and uncovered his feet, and laid her down. 3:7

And it came to pass at midnight, that the man was afraid, and turned himself: and, behold, a woman lay at his feet. 3:8

And she lay at his feet until the morning. 3:14

David, after impregnating Uriah's wife, Bathsheba, told Uriah to go home and wash his feet. (Meaning "Go home and have sex with your wife.)

David said to Uriah, Go down to thy house, and wash thy feet. 2 Samuel 11:8

(Uriah refused to "lie" with his wife in 2 Samuel 11:11)

The Lord will shave the king of Assyria's "hair of the feet"

In the same day shall the Lord shave with a razor that is hired, namely, by them beyond the river, by the king of Assyria, the head, and the hair of the feet. Isaiah 7:20

Ezekiel condemns a women who "opens her feet" to everyone that passes by.

Thou ... hast opened thy feet to every one that passed by, and multiplied thy whoredoms. Ezekiel 16:25

Zipporah saved her husband, Moses, by cutting off the foreskin of their son and casting it at Moses's "feet".

Zipporah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me. Exodus 4:25

Isaiah's seraphim modestly cover their "feet" with their wings.

Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly. Isaiah 6:2

David told Uriah to go home and wash his feet.

David said to Uriah, Go down to thy house, and wash thy feet. 2 Samuel 11:8

King Asa had an exceedingly great disease in his feet. (A urinary tract infection, STD?)

Asa in the thirty and ninth year of his reign was diseased in his feet, until his disease was exceeding great: yet in his disease he sought not to the LORD, but to the physicians. 2 Chronicles 16:12