A Hinge dirty opener is a flirtatious, suggestive first message that uses the recipient's own profile prompt as its anchor point - making it feel personal, not pulled from a list.
dirty pick-up line is a sexually suggestive or provocative opener designed to signal interest, create tension, and invite a flirtatious exchange - but its effectiveness depends almost entirely on context, timing, and delivery.
"Keeping it casual" in dating is a relational positioning statement that signals a deliberate limit on emotional investment, commitment, or vulnerability - regardless of physical or conversational intimacy.
Deep questions work over text when they invite reflection rather than reporting - the goal is to make someone think about themselves in a way they haven't been asked to before.