Hey if its good enough for someone who speaks to God then it should be good enuff for everybody else.
http://www.jw.org/en/publications/bible/genesis/24
28
Now Abraham was old, advanced in years; and Jehovah had blessed Abraham in everything.2Hence Abraham said to his servant, the oldest one of his household, who was managing all he had: “Put your hand, please, under my thigh,3as I must have you swear by Jehovah, the God of the heavens and the God of the earth, that you will not take a wife for my son from the daughters of the Ca'naan?ites in among whom I am dwelling,4but you will go to my country and to my relatives, and you will certainly take a wife for my son, for Isaac.”
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http://www.jw.org/en/publications/bible/genesis/47
And Jacob lived on in the land of Egypt for seventeen years, so that Jacob’s days, the years of his life, came to be a hundred and forty-seven years.
29Gradually the days approached for Israel to die. So he called his son Joseph and said to him: “If, now, I have found favor in your eyes, place your hand, please, under my thigh, and you must exercise loving-kindness and trustworthiness toward me. (Please, do not bury me in Egypt.)
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In fact the word Testament which implies an oath comes from the ritual we have observed in the above scriptures of taking an oath by grabbing some testicles.
http://en.wiktionary.org/wiki/testament
Etymology
From Middle English , from Old French , from Latin testamentum ( “ the publication of a will, a will, testament, in Late Latin one of the divisions of the Bible ” ) , from testari ( “ to be a witness, testify, attest, make a will ” ) , from testis ( “ one who attests, a witness ” ) .
http://en.wiktionary.org/wiki/testis
Etymology
From older terstis, probably reformed from tristis, ultimately from Proto-Indo-European *trityo-sth2s "a third party standing" after the two parties to a contract or dispute. Cf. Oscan trstus ( “ witnesses ” , nominative plural ) [1] .
http://en.wiktionary.org/wiki/testicle
Etymology
Latin testiculum, testicle, diminutive of testis, witness + diminutive suffix -ulum
[edit] Noun
THe ancient jews like other pagans were obsessed with penises, we can see it everywhere in their religion and rituals.