Quote 1
The fair girl went on her knees, and bent over me, fairly gloating. There was a deliberate voluptuousness which was both thrilling and repulsive, and as she arched her neck she actually licked her lips like an animal, till I could see in the moonlight the moisture shining on the scarlet lips and on the red tongue as it lapped the white sharp teeth. (3.32)
The vampire's kiss is described in very sexual terms. And the traditional power dynamic is reversed—the woman is the sexual aggressor, and Jonathan is the passive one.
Quote 2
She still advanced, however, and with a languorous, voluptuous grace, said:—
"Come to me Arthur. Leave these others and come to me. My arms are hungry for you. Come, and we can rest together. Come, my husband, come!" (16.20-21)
Again, vampire Lucy is too sexually aggressive. In the world of Victorian England, that sexuality needs to be repressed!
Quote 3
A woman ought to tell her husband everything—don't you think so, dear? (5.6)
Lucy and Mina like to exchange ideas about all kinds of things, especially (since they're both engaged) the roles of husbands and wives.
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.
Quote 7
Then, too, Lucy, although she is so well, has lately taken to her old habit of walking in her sleep. (6.39)
Lucy's habit of sleepwalking makes her vulnerable to Dracula—it puts her in a state of semi-conscious passivity.
Quote 8
I believe we should have shocked the "New Woman" with our appetites. (8.1)
Mina and Lucy go on a long walk, and are so hungry when they get back that they eat a huge amount, without worrying about being prim and proper.