Why do you get that feeling of 'butterflies' in your stomach?

You get that feeling in your stomach, known as 'butterflies' (and also 'knots') because you are feeling nervous, anxious or fearful. It could happen before a test, before asking a girl out or when you are getting in trouble with your parents. It happens to everyone, so don't feel bad about it. Figure out ways to relax using breathing exercises or meditation techniques.