Five ways to make anyone fall in love with you

4. 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.

5. Practice pupillometrics

We all know 'bedroom eyes' when we see them: it's the look of lust. There's just one thing you need for bedroom eyes: big pupils. According to 'pupillometrics', the science of pupil study, this is the crucial element we respond to. You can't consciously control your pupils (one reason why people say the eyes don't lie). But you can create the right conditions to inspire large pupils and get the effect.

First, reduce light. Our pupils expand when they're robbed of it, one reason why candlelight and dimmer switches are de rigueur in romantic restaurants. It's not just the softening of light that makes our faces appear more attractive, larger pupils also help.

Scientists showed two sets of pictures of a woman's face to men. The photograph was identical, except for one thing; the pupils in one set had been doctored to make them larger. When shown the doctored photograph, men judged the woman as twice more attractive than when shown the real photo. It was repeated with a man's face and tested on women and gave the same result.

Our pupils also enlarge when we look at something we like. Again, this can be proved using pictures. This time, researchers put a picture of a naked woman into a pile of otherwise bland, commonplace photographs then watched men's pupil size when they flicked through them. Without exception, the men's pupils expanded on cue.

This means if you're attracted to someone a lot, your pupils are probably already big, black holes. All good. To ensure this is happening or to up the effect of your bedroom eyes, focus on the part of the person you like the most.

On second thought, better make it the next best thing!

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