to FornicationFreeway :I've done it and can recommend. Feeling a woman's butt hole throbbing around your tongue with orgasm while your fingers in her vagina are pulling her sphincter down deep on your tongue towards your face? It's memorable and very very hot.
to FornicationFreeway :TLDR: Same position as in your video, but with two of his fingers in her vagina and he can use those two fingers to drive her sphincter over his tongue. If she uses a vibrator, he can use those fingers to keep the orgasm from pushing his fingers out and feel her ass throb on his deep tongue.