Work is a hard task that is giving to you but when is it beneficial to you?
Sometime when you work, it is beneficial to yourself so you don't get paid.
For example Kids do school work but it is beneficial for themselves so they don't get paid. However teachers teach children which is beneficial for the children so the teachers get paid. In a way it is beneficial to the teachers because at the end of the month they get paid. Another example is that parents do work for their kids. They cook food, wash and iron their clothing and loads more which is work, but they don't get paid because it's their own child they are looking after however if it was a childminder, they would get paid because it is not their own child they are looking after.
I hope you understand what I mean!
Do you have any other examples?