We wish to run away from, escape from Suffering.
We have accepted that Suffering or Pain is natural and will return again...
Why don't you ask - Why do humans Suffer ? How to end Suffering ?
Is there a way to end, reduce the effect of Suffering other than - Sex, Drugs, Alcohol etc ?
Know that whenever and each time you think about - I, Me, Myself - my life, my happiness, my freedom, my family, my love, my emotions, my feelings, my hurt, my career, my existence , my respect- The Me, Myself - The 'I'. - Suffering begins.
So be self centered but be 'Honest' about it. Know about it, accept it, become still and remain in the time when such thoughts arise and tell yourself - I am being selfish and so is the other person... You are human and so is everyone.
Your Suffering will turn into Wisdom and gradually into Selfless Love for all the living.