Object oriented programming - class design confusion

Question

I am trying to wrap my head around object oriented programming.

My understanding is that we have objects so we can design our programs to mirror real-life objects.

Answer 1

You're correct that probably eat() would be a method of a human or mammal or fruitFly. A fruit itself probably has no behaviour, and hence no methods.

I don't often consider the benefits of OO in realtion to the mapping from real things to Object. That's probably because we deal with less tangible concepts such as Invoices and Orders.

I see the primary win from OO to be in the structure it brings to my code. In the real world Invoices and Orders don't actually do anything, but in my code they do. So the programmtic Order may well be much closer to the combination of the data representing an order, and some human business process relevent to the order.