After I have masturbated once I seem to want to masturbate another few times at least in the same day. Another strange thing I notice though is my erections and sexual arousal seems to get better after I have masturbated. So the first time I masturbate it might not be good, the second time it's better, and then the third time it's even better. Why would I be more sexually aroused and have a better erection from masturbating more?
Well this is the idea of "Addiction" Once you start, you can't easily stop This also explains why you fell much aroused, because none is enough in addiction.