there is video of it too...
Came across it on some regular xxx tube site, and from preview images you didn't see it was mans ass... but one should guess it. There are maybe only few such acrobats performed by women. I guess Dirty Garden Girl does similar stuff. Anal boxing, prolapse fucking, etc, hah. "Extreme porn" is nowadays on such level, it's hard to think what next.
That's also one reason why many of the extreme stuff is hardly that interesting anymore. If their only quality was taking it that far, and someone took it further... what then?
I think couple of my recent curiosity finds are couple old magazines where levels of oddity goes on such level it's just "what the hell?!" type of thing.
Photo-magazine with serie of photo starting from woman going into monastery to have sex with nuns, then progressing into trip to some mansion where she is surrounded by dolls and fucked by man, while nazi officer is watching their actions. And progressing to fucking session on field, where those same dolls stand in circle around the act. Very weird stuff from 70's.
And another was story from TOY magazine. Very very detailed story of leather & rubber clad sex commandos who operate battleship with huge tank consisting just human excrements. Story would merely depict the details of what sorts of gas-masks they cum into, and what kind of tubes connected to shit-tank forces the enemy slaves to inhale stench of shit and piss, etc etc. With broken english, yet pathologically obsessive text, it was something very much suitable for noise tape cover!