They probably get hurt easily because they are sensitive. another reason why could be that what you said hurt them or triggered something.
Deformations of collagen elasticity, leading to Scurvy
The simplest human and animal geometric form schemata available to our visual memory — such as the examples in the drawings of humans and animals by children and adults — give no hint of the specific mobility of these beings. The most we can gather from the child’s drawing of father, mother and child (42) is that these people are standing upright on their feet — although even that is not completely clear — just as we cannot detect any movement in the depictions of people and animals on the North American bag (351), despite the far richer geometric details.
