the truth as I know it
For Christmas, I bought Robert Crumb's excellent graphic-novel-version of the Genesis for my father. Of course, I had to test-read (test...) it to ensure he doesn't end up enraged/disappointed/confused. Crumb made a point of showing that exact line ("Put, I pray thee, your hand under my thigh, and swear...") as being meant exactly as it is: a thigh. No more, no less. Wise man.However, I find the idea of testicle-swearing quite amusing though - transferred to us gals (as if we didn't have to swear now and again!) we should probably start holding each other's chests (??)... What a sign of trust!
I welcome any comment, so happy to hear from you.