Don't look away

There was another crucial finding from Rubin's research: The couples took longer to look away when someone else joined the conversation. Again, if you do this to someone who's not in love with you (yet), you trick his brain into thinking he is, and even more PEA floods into his bloodstream. Relationships expert Leil Lownes calls this technique making 'toffee eyes'. Simply lock eyes with the person you like and keep them there, even when he has finished talking or someone else joins the conversation.

When you eventually do drag your eyes away (three or four seconds later), do it slowly and reluctantly, as though they're attached by warm toffee. This technique may not sound terribly inspired but, believe me, if done properly it can literally take your breath away. If you're too shy to gaze openly, skip the toffee and think bouncing ball. Look away and at the other person who's joined the conversation, but every time they finish a sentence, let your eyes bounce back to the person you're interested in. This is a checking gesture - you're checking his reaction to what the speaker is saying - and lets him know you're more interested in him than the other person.