Best use of an upside down whore head in real life is to have a whore's head upside down and hanging over the edge of a bed so you can fuck her mouth while another whore is spreading your ass to eat your bunghole.
Setting aside the fact that this isn't logistically possible, who desires such a thing? I don't get it. Time and time again I see girls licking male butt in pornography and I feel I need it explained really. The whole thing speaks to an anemia if the imagonation, or a dreadful sort of boredom, the sort of phenomena that happens at the tail end of empire before it inevitably self immolates.