She can have sex and romance all she wants outside of caracter in her private life.
"Because looks are the only thing that matters?"
I am talking just onscreen here.
Its not just looks, also demeneaor. Janeway is as cold as Tuvok.
So because she's not Jeri Ryan she's not allowed to have a life on camera?
And did you ever watch the series?
Janeway was not cold. You must be mistaken with Seven of Nine, because Janeway felt emotions from "Caretaker" to "Endgame"
ETA: And Tuvok was very emotional for a full Vulcan.