I see. Well, Klinefelter's Syndrome is hardly an enigma anymore and hasn't the slightest meaningful bearing on the topic at hand. I've studied about and written on atypical genotypes, in the context of human sexual behavior, so there's no need to dazzle me with any more examples.
Your chimp-gangrape-of-teen-girl scenario is absurd, to put it mildly. As for "Oliver" I'm not the kind of fool that gets taken in by charlatans, especially not when genetic testing clearly revealed that "Oliver" had a normal chimpanzee genotype and excluded any possibility of hybrid origin.
The normal social order of chimpanzees in the wild is the closely related male gang. They swap girls just like humans.