Perhaps initially in Afghanistan, the double tap was useful as al-Qa'ida or Taliban members would collect the bodies.

[Jeillie Duncan, a servant-girl] made so many cures that she was presently suspected of witchcraft. She was treated to orthodox modes of torture; her fingers were pinched with the pilliwinks, her forehead was wrenched with a rope, but she would say nothing until the Devil's mark was found on her throat, when she gave in and confessed herself a servant of Satan. The incident described is the same one mentioned in the 1592 quotation.

I wondered, too, about Aaron and Lonia's sex life: did they pull off 69ers, had Aaron ever taken her from behind?

… His ſtarrie Helme unbuckl’d ſhew’d him prime / In Manhood where Youth ended ; by his ſide / As in a glittering Zodiac hung the Sword, / Satans dire dread, and in his hand the Spear.