You hope a female is asexual because you don't like the way she looks? If she's not pretty enough for sex in your mind, she isn't fit to be having sex with anyone? Because looks are the only thing that matters?
I hope you don't think that about real human beings. That's just... incredibly wrong. I hope it's just a joke.
EDIT: Guy has a point about the boobies.
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.