Today, I found this.
Parents who foster an avoidant attachment with their children frequently discourage the open display of emotions. They distance themselves physically, [and] become upset or angry when their child shows signs of fear or distress.
Consequently, children learn to ignore and suppress their emotions to satisfy one of the most important aspects of closeness – the need for physical connection with their parents.
[Next up, how to fix this if this is you. Hint: ‘How do you feel?’]