Familiar to all of us, is the fact that we might have missed a joke, but are too embarrassed to admit it. We laugh awkwardly, hoping our cover up goes unnoticed. Most of us have had to force a laugh on different occasions, at a party or the office. Maybe we laugh too early or too late. A person who laughs too often is either very happy or most often, embarrassed.
Laughter is a way to reduce tension.
Giggling may be a sign of secret sexual tension expressed by men and women, especially in Asian cultures. Many Africans express surprise, wonder, and sometimes discomfort in the form of laughter. Westerners are the people most likely to laugh if they see someone slip on a banana, or when they are told that someone has died. They hide embarrassment and shock, but also convey to others that they find it amusing that they are embarrassed. If you laugh or smile a lot, the lines become permanent, which can then be interpreted in your face language.