If you flirt, you need to wait for some type of response, or you're flirting for nothing. If you've touched someone, say twice on the hand or arm, and they haven't touched you back, slow down. Flirting is a two way street. You can still be interested, but wait for them to catch up. When you stop, your body language shows a need for them to express themselves. If they don't, you can try again later; maybe they need a little convincing. But don't go too far out on a limb, or you look desperate, and they won't respond.