Quote 4
Men like women, certainly their wives, to be quite as fair as they are; and women, I am afraid are not always quite as fair as they should be. (5.6)
Lucy idealizes men: She thinks that they're more "fair" than women are.
Quote 5
I supposed that we women are such cowards that we think a man will save us from fears, and we marry him. (5.7)
Lucy makes a generalization about all women—she thinks that women marry men to run away from their fears, thinking that the man will "save [her] from fears."
Quote 6
Why can't they let a girl marry three men, or as many as want her, and save all this trouble? But this is heresy, and I must not say it. (5.11)
This is a pretty scandalous thing for Lucy to say! She's basically advocating polygamy here. This is what we're talking about when we say that Lucy is naturally more sexual than Mina is—Mina would never, ever suggest that it would be awesome to have more than one husband.