I may be the exception to the rule, but I have done successful bulking and cutting without counting calories. I find my appetite tells me my maintenance needs perfectly. Eat slightly more than my appetite...bulk, eat slightly less than my appetite...cut. I have always been naturally lean...it is genetic.
I read a study about mice...some mice have a certain gene that controls their body composition through appetite, they were given an unlimited supply of food, but did not overeat and maintained their weight. The second group of mice did not have the 'lean' gene, they also were given an unlimited supply of food, but they ate too much and got fat.
I am like the first group of mice, in that my brain signals to me how much to eat to maintain my current body mass. If I exercise heavily I get really hungry, if I lift weigths my body gets hungry to put on muscle. If I lie in bed all day, I hardly need to eat. Of course I may well be in the minority, the majority of people may not have the so-called 'lean' gene and need to count calories or their weight may fluctuate, etc.