Small, subtle touches like slightly brushing your hand against theirs when you're walking, gently tapping them on their arm when they make you laugh, or touching their arm during a conversation is one way to show someone you're interested.
Leaning in while conversing, holding eye contact, and even crossing your arm while talking to someone can be deciphered as flirty body language. Bonobology says: The most powerful language is the one that isn't spoken.
This can mean buying a drink in a social setting, freely giving compliments, side arm hugs or other non-sexual touches, a platonic friendship. The term “harmless” is only applicable if you are willing to disclose this behavior (without shame or concern) to your partner.
Run your fingers through her hair while looking in her eyes. Grab her around the waist and pull her hip against yours. You can also pull her directly towards you and have your waists touching. Touch a necklace she's wearing while brushing your fingers on her neck.
Innocent flirting is a lighthearted and playful form of social interaction that involves casual, friendly banter, compliments, and teasing without any serious intent or expectation to pursue a romantic or sexual relationship.
Sincere. This is the most common flirting style, and that's probably for the best. Sincere flirts are direct and honest in their interest, and they aim to build emotional connections from the beginning. They'll strike up a conversation about the book you're reading.
In his book he examines five key styles: polite, playful, sincere, and traditional. Take the quiz here to see which one you are. There is no right or wrong way to flirt, but according to author Jeffrey Hall there are five different styles.
“Making eye contact and holding it just a few seconds longer than a casual glance causes him to take notice of you and start to wonder what you may have meant by that,” says Lieberman. “It's the cool 'silent flirt' that can make him want to know more.”
Successful flirts demonstrate their intelligence. Intelligence is a highly desirable trait, and it can be communicated with humor, wit, education, and interesting conversation. People, especially women, are more inclined to be attracted to flirts who show their intelligence. Take a gentle approach.