Boyfriends often brag. Why? Is it because of inferiority?

It is normal for some people to brag, mainly depending on which aspect they brag about. Generally speaking, the main factor of bragging is to show yourself better, or to choose bragging when comparing with what others don't have. Another big reason is that the inferiority caused by not having this thing leads to bragging behavior. You can guide or get to know him properly and correct this habit slowly. I wish you happiness.