I feel like we have a lot of expectations. We expect things from other people all of the time when we aren't necessarily deserving of said thing we expect. At the same time people expect us to do things for them as well. It's no wonder that we expect things for fulfilling the expectations of someone else. It's only fair that, once my expectations are fulfilled or if someone's expectations are fulfilled by you, you are rewarded for that accomplishment.
We're also expected to do things for not people. (It's kinda funny to say not people because its weird and different than just saying things other than people). Anyway, said things can be the "environment" or animals. We're expected to help save the environment all of a sudden because we expect that if we don't it will hurt us. Along with the environment comes other animals and organisms that expect us to make sure they keep their habitat and have enough space to live. That is if we are held up by others expectations to protect the environment.
It seems like that's how it all works in general. We are given expectations to fulfill our entire life which in a sense keep us busy and on a track to somewhere. As you get older it seems like you're always expecting to have to fulfill an expectation. But as soon as you realize this it seems like you have developed the inability to fulfill all of these expectations.It seems that fulfilling your own personal expectations have to take a back burner to the demands of others that you are expected to fulfill.
I don't know if this ends at some point because I am stuck in the stage in my life of fulfilling others expectations and I realize that in order to "make it" you have to expect the unexpected expectations in life and strive to fulfill them.