When should we sayit's my pleasure?

'It's my pleasure' is just a term and it doesn't mean everyone has to say it. On occasion I may use this term depending on the circumstances.

Example: If someone has chosen me to help them out and they reply back that they appreciate what I've done for them to help I'll often say 'It's my pleasure' because I felt honored the person consoled in me out of so many other people they could have asked.