Lurker backwardhatclub sends this one along from a
Russian livejournal entry and once again we will have to rely on you Russian translators to get us more information.
It's more picturesque than anything else. Anyone having seen Cirque du Soleil will have seen similar setups. But unlike Cirque detractors, I am all in favor of the use of acrobatics for artistic or even merely aesthetic interpretation.
In other words, I say,
if it looks cool, do it.
I would also expect this to have some beefcake value for those who prefer the pictured sex. Like the thighmaster, this kind of activity would have a beneficial effect on ass quality.