Ok.... Scenario.... You're walking through town, you see a hot girl/guy walking towards you and you want to make a move realising you may never see them again. How do you go about it? Do you give them a glancing smile and let it linger a bit, if they smile back hit them with a 'Do I know you from somewhere' line. Or do you rip off your top, point to them, then your chest and then make rumpy pumpy actions while grunting signalling you want to do horrible caveman things to them.... What works for you guys and girls and what does not. Similarly how would you not like to be 'approached'. Just randomly bumped into a girl I've seen a couple of times on the bus, anyway was mid mouthful of food but smiled and hit them with a 'Do I know you line' and got chatting, wasnt the best first impression but set me up for another chat when I do see her.