1. Women smile more than men do due to social conditioning cues, so a man's smile more likely indicates romantic interest--In general, women and girls smile significantly more than men, but it's not necessarily because they're happy. Both sexes are given signs early on that they should "cover" their true emotions for the sake of social protocol, but women tend to "get" the message sooner. In other words, in polite society, females are socialized to put on a happy face. Girls are much more likely than boys to get the message that nice girls smile, even in the face of disappointment, anger, frustration, or sadness. So if a woman's out on a bad date, she's still going to grin and make the best of it. In other words, don't automatically assume that her smile indicates she's having an awesome time.
2. Love- and lust-driven smiles look different from each other, but your eyes help reveal the difference--Married couples who are deeply in love show significantly different kinds of smiles than those of people who are in lust. The key to spotting the difference between the two can be found in someone's eyes. In a genuine, spontaneous, deeply felt and positive smile, you get changes around the eyes in addition to the classic upward outer corners of the mouth. With a "genuine" or "love" smile, the area around the eye socket will contract, which raises the upper cheeks, pulls down the eyebrow, creates a fold in the upper eyelid and closes the eye a little bit. So people who "genuinely" smile a lot get wrinkles in the corners of their eyes as they age, so be proud of your crow's feet--they're signs of a life that's been filled with authentic smiles and lots of love! When lust-filled couples smile at each other, there's no eye-socket action going on, but there is more activity involving the tongue and lips. So check for wrinkles around the eyes or stealthy lip-licking to learn the true intentions hidden behind your date's smile.
3. Men confuse smiles with romantic interest from women, so the key to spotting a "fake" smile is…--Men are more inclined than women to almost always interpret a smile on a woman's face as an indicator of sexual interest when it actually could've been something else. This is true even when the woman was offering a "social" smile (sometimes called a "fake" smile), which is commonly seen in the course of everyday interactions with coworkers. In this type of smile, the corners of the mouth come up — and more often than not, the lips stay closed. It's friendly, polite, and sociable without resembling anything like a warm, flirtatious or "let's talk" kind of smile. Women are significantly better than men at being able to tell the difference between genuine smiles and fake ones. And men are actually bad at it. Men are much more likely to interpret any smile from a woman as being genuine and heartfelt until otherwise indicated. If you're female and really not interested in a man you see, don't smile too much in his direction.
4. People in certain industries are trained to smile automatically, so ask about your date's job before trying to gauge his/her true level of interest--Another reason why women smile more than men do is because they're more likely to be working in occupations that require them to be sociable and friendly. If you put men in the same occupations, they end up smiling just as much as women do because it's a requirement of the occupation. Salespeople — regardless of whether they're male or female, selling automobiles or makeup — sell more products when they smile than when they don't. So if your date happens to be a very smiley person, feel free to ask about his or her work history.
5. High-powered people are less intimidating when they smile, so if you're in an enviable position, flash those pearly whites to disarm your date—If you're a woman with an intimidating career, then it's probably in your best interest to smile when you're on a date. Sometimes, men are threatened by a powerful woman. If a woman is in a high-powered job and afraid her date might have an issue with that, she could make an effort to smile more, which will probably make him more comfortable.
6. Smiles can have different cultural accents, depending on the region and/or country you're from--Believe it or not, smiles actually have their own accents. Each country or culture has its own ways of smiling. For example, in the U.S., most people see smiling as a positive thing and Americans do it even while traveling. Northern Europeans — including French, British and Scandinavian countries — look at smiling as something that's reserved only for the people you really care about; they believe that you don't just smile at anybody. Instead, you smile at the people that you've already established some kind of relationship with. And the Japanese are taught to smile because their culture tells them not to make others uncomfortable with their personal misfortunes.
People in the U.S. Midwest and Deep South smile more than people in the northeast, western or mountain states. So if you're on a date with someone who was raised in another country, region or culture, you might misinterpret the absence of smiling as an indicator that the person is mean. If you feel there's at least some interest coming across, give it time to see if you can translate the other person's smile dialect.
7. A smile on a Botox-filled face can actually be off-putting to other singles--Beware of Botox. Paralyzing your facial muscles may also freeze up your dating life. A study showed that when regular people were given Botox injections, which paralyzed some of the most expressive facial/smiley muscles, they became depressed. If an open and reciprocal relationship is your goal, you might want to look out for people who are afraid to show their emotions through facial expression.
8. Smiling for the camera with someone you're attracted to helps create an instant, positive bond between the two of you—If you're having a good time with your date, get someone to catch you two saying "cheese!" and snap a photo. Just having your picture taken with someone can lead you to have more positive feelings towards each other. A study showed that when strangers were introduced, if they had their photos taken together, they ended up saying they liked the person they took a pic with more than other new people they met.