Emotions

You know when you reach a particular age and level of maturity, you don't want your emotions to be a liability on others. You learn to react less to things and create different kinds of mechanisms to handle your emotions. You become self-sufficient in handling the extremes of your emotions without letting it spill all over the place, because you realise that it doesn't do anyone any good anyway. You take some time and let time wear off the smaller things that bother.