My two cents? (it is LPSG, Why not??)
I think he is a complete OCD neurotic that is sexually repressed and really has no interest in sexual contact with people.
Base this on the fact that he is so well-known, nobody can keep a secret, and if he was straight, gay, bi, whatever and having sexual contact with other people, we would have something to go on, some pap photos or rumors circulating regarding escorts. Yet nothing.
He could also be a the very rare autosexual. It would explain his clear attention to his appearance.