You can find all of these types of nonverbal communication in the book, Dating Decoder, along with drawings taken from real situations that show body language in dating situations.
Their nonverbal exchange made Deidre smile.
Nonverbal communication could be gestures, idiosyncratic movements, cultural habits, posture, involuntary physiological responses to stimuli, and "costumes and scenery."
Unless you're flirting with someone you know very well, or are in a situation where a wink seems to be particularly appropriate, it's generally not a good idea to risk using this type of nonverbal signal.
Most children can work toward some level of improvement.For communication improvement, one of the key developmental needs is understanding and using nonverbal communication.