Nonverbal meanings are more flexible and ambiguous than verbal meanings. A smile can express comfort or contempt, just as a shared glance can convey intimacy or warning—depending on the situation. The ambiguity of nonverbal messages can pose difficulties for interpersonal communication and relationships. For instance, suppose a friend you suspect of harboring romantic feelings for you gives you an extra-long hug. Is he or she just being friendly or signaling romantic interest?