Good night mommies, we've been feeding him almost every hour for four …

Good night mommies, we've been feeding him almost every hour for four months, when the milk flows well he drinks right through it, but when it starts flowing slowly he begins looking around, some say that when he's full he starts playing, and if I give him a second breast immediately he sucks intensely in the first minutes then plays ???? I tried feeding him lying down, standing up, in a noisy place in silence it doesn't help ??? He always gets distracted ? Lately, he started biting his cheeks with his gums ? What should I do? P/s my son has allergies, don't pay attention to my appearance?? I hope I am not the only one like this