You don't need a reason to help people.

People love to be appreciated for the things that they do and say. Appreciation acknowledges their value and uniqueness. When you appreciate someone for something, you raise their self-esteem, increase their self-confidence and improve their self-image. The more you appreciate someone for something, the more likely they are to do it again, and to do it even better next time, so that they can earn even more appreciation than before.