This one is for the guy who isn't afraid of rejection. You compliment her first, "I can't stop looking at how gorgeous you are." and then you ask the kissing question. This one puts the ball in her court and let's her respond with a flirty answer of her own. Of course, this line is better left for later nights out than talking to a girl you see in the street. Try this opener when she's in a relaxed, flirtatious environment.