Many articles on this site talk about the effects of neurochemical fluctuations caused by withdrawal or orgasmic "hangovers" on mood and relationships. The easiest way to understand these effects is to experience them for yourself. However, due to being "inside" the experience of your own moods, it can be difficult to see your own fluctuations in an objective way. When you are "down," it seems like things have always been that way, and likewise when you are feeling better. Similarly, while experiencing cravings for porn or more orgasms, it can seem like the cravings will never go away.
If you're curious, create a spreadsheet and track your your orgasms and your mood for at least three weeks after orgasm.