B'Elanna: "Enjoying the view?"
Seven: "Explain."
B'Elanna: "You've been staring at us all night, in fact you were following us yesterday when we were walkign to engineering and the day before when I was waiting for Tom outside the shuttle bay."
Seven: "You are correct; I have been observing you, it's part of my research on human mating behavior."
(B'elanna picks up a padd and reads some things off it.)
B'Elanna: "How the h*** do you know when we're having intimate relations?"
Seven: "There's no one on deck 9 section 12 who doesn't know when you're having intimate relations."
B'Elanna: "I want all the data you've collected."
Seven: "I haven't completed the study."
B'Elanna; "Then study this, Borg provokes Klingon; klingon breaks Borg nose...call sickbay tell them there's about to be a medical emergency."
B'elanna and Seven of Nine, Star Trek: Voyager episode "Someone to Watch Over Me."
Doctor: "...you're a woman, Seven."
Seven: "Is that an observation or a diagnosis?"
same episode as above