A causal event is not a reason. There is no underlying thinking of the universe, it is just an endless chain of consequences from an initial action that has no discernible cause. (spontaneous symmetry breaking of the unified vacuum)
Reasons are things humans make, to explain things. The universe explains nothing.
Here, dont take my word for it:
http://www.merriam-webster.com/dictionary/reason Full Definition of reason
1
a : a statement offered in explanation or justification <gave reasons that were quite satisfactory> b : a rational ground or motive <a good reason to act soon> c : a sufficient ground of explanation or of logical defense; especially : something (as a principle or law) that supports a conclusion or explains a fact <the reasons behind her client's action> d : the thing that makes some fact intelligible : cause <the reason for earthquakes> <the real reason why he wanted me to stay — Graham Greene>
2
a (1) : the power of comprehending, inferring, or thinking especially in orderly rational ways : intelligence (2) : proper exercise of the mind (3) : sanity b : the sum of the intellectual powers
3
archaic : treatment that affords satisfaction
in reason
: rightly, justifiably
within reason
: within reasonable limits
with reason
: with good cause
Humans CREATE reasons, to explain what is.
They always come after the fact. You can predict that you will like something, after having done that thing in the past, but that does not change the reality that the event itself is what is pleasurable, and you are simply rationalizing that pleasure after the fact with your reasons.
To wit- Being gay is not a choice. One does not go "You know, I think I will be gay from now on." It does not work that way. They have always been gay, and come to that startling revelation. Then they rationalize why it is OK to be gay, and why they like the things they like. This is also why "reprogramming camps" dont work. You dont choose what you find enjoyable. You cant be told what you find enjoyable either. You can choose to do things that you know to be enjoyable, but that is most certainly NOT the same thing.