Alright, so the standing 69 looks cool, but I think I'd be insanely distracted by all the blood rushing to my head. Have you ever done this? (Successfully?)
I don’t think the standing 69 is meant as a finishing position as much as a passionate transition position. And I have done it successfully before, it works best going from her arms wrapped around my shoulders so I can rotate her whole body around and start to go down on her while carrying her. Of course this requires both partners to be of ideal strength and size. But it is exciting and a unique experience.