Seska manipulates men with sex. Maybe she manipulates women with sex too, but how would we know anything about that since Star Trek is homophobic... Seska manipulates men with Sex, and Tuvok couldn't make waves or rock the boat, or give any one reason to believe that he's anything other than what he is pretending to be "disgruntled terrorist scum". Tuvok had to sleep with Seka to keep his legend intact. Seska had to sleep with Tuvok, so that she was still the power behind the throne in case Chakotay accidentally just happened to die, before she needed him to die, and she still needed some guy to wear a bridle she could tug on. Yes, women can control men with their sexuality without actually needing to have sex, but why make this harder than it has to be? (I see what I said, shut up.) Which just begs the question, do Vulcans mate out of Season, or... Maybe Tuvok faked Pon Far to gain her trust and... Although if he was going to use his sexuality to cement his false Loyalty to the Maquis, then sleeping with the captain's girlfriend is a self destructive asinine move, when the far smarter choice is the Chief Engineer of the Val Jean, who has really obvious daddy issues.