When people take everything you say as a personal dig at them.
For example, my teeth are rotting out of my head because for a few years I had an unfortunate attraction to soda and there wasn't enough tooth-brushing in the world that could save them. So my dentist has me on a nightly medicine that's supposed to help grow back enamel. (I didn't have enough enamel to begin with because as a kid I ate oranges all the time and sucked on lemons. Literally would pop a slice of lemon in my mouth and suck on it until all the fleshy part was gone, then spit out the rind and pop another lemon slice in.)
So I'm whining to my stepmother that the enamel-growing medicine kinda hurts, and she goes off on how she did her best raising me and she swears she made sure she took good care of my teeth and took me to the dentist all the time and no one should blame her because I have no enamel. Like really? I never said anything about any of it being her fault. In fact, I distinctly told her it was because I drank too much soda after I moved out of her house. >.> Mothers be crazy!