This is reality, where in Brobdingnag all giants did assume, you are not a person, you are just some alive interesting speck of something, maybe animal, maybe insect. So Glumdalclitch never did teach you to learn their language. So they do not understand a thing in your words, for them this is just cute sounds of very small creature. And you also do not understand their talkings, it is just booming female thunder in your eyes. You can understand their emotions and mimic of their faces, but that is all. You was taking to the court of the queen of Brobdingnag, but all ladies think, you are just unusual tiny alive pet with not mind and personality. So they have no any shame at all nor embarrassed by you and do not pay any attention to your presence. They can change clothes, get naked, take a bath, comb and style their hair with the help of maids, or put on their own clothes. For giantesses, you are just a decorative figurine on a table or chest of drawers, or something like a decorative bird or animal.