Never having been cursed with the possession of illimitable wealth I can only speculate, but it strikes me that over and above any particular attraction to underage sexual partners is the feeling of pure transgression without consequence. People of lesser clout do not get invitations to orgy islands, after all (well, I never have). Progressive social activists have so raised the bar on the transgressive that kiddie sex, cannibalism, and human sacrifice are about the only forbidden fruit available. Orgies between consenting adults have become pretty plebian.
Still, when the transgression in question involves other human beings it's a little like juggling with live hand grenades. Not only the victims, but one's fellow perpetrators become a mortal hazard and the manipulator behind it all becomes the prime target, as Epstein discovered. The moment he heard the bars clang he had to know they'd reach him.
Theodore is greatly underrated.