In the final act of Pygmalion, Liza explains to Prof. Higgins the relationship she desired from him. It’s a tender scene that almost warms the Professor’s heart despite himself.
LIZA: No I don't. That's not the sort of feeling I want from you. And don't you be too sure of yourself or of me. I could have been a bad girl if I'd liked. I've seen more of some things than you, for all your learning. Girls like me can drag gentlemen down to make love to them easy enough. And they wish each other dead the next minute. (much troubled) I want a little kindness. I know I'm a common ignorant girl, and you a book-learned gentleman; but I'm not dirt under your feet. What I done (correcting herself) what I did was not for the dresses and the taxis: I did it because we were pleasant together and I come--came--to care for you; not to want you to make love to me, and not forgetting the difference between us, but more friendly like.
Unfortunately, Higgins is a permanent bachelor. When he is incapable of offering affection, Eliza Doolittle stands up for herself in this powerfully feisty monologue.
LIZA: Aha! Now I know how to deal with you. What a fool I was not to think of it before! You can't take away the knowledge you gave me. You said I had a finer ear than you. And I can be civil and kind to people, which is more than you can. Aha! That's done you, Henry Higgins, it has. Now I don't care that (snapping her fingers) for your bullying and your big talk. I'll advertize it in the papers that your duchess is only a flower girl that you taught, and that she'll teach anybody to be a duchess just the same in six months for a thousand guineas. Oh, when I think of myself crawling under your feet and being trampled on and called names, when all the time I had only to lift up my finger to be as good as you, I could just kick myself!