What unreasonable behaviour have you committed in the past, that would have earned you a dressing down on mumsnet 'AIBU'?
I'll start. When I moved in with my now-husband, he had a painting on his wall of a naked woman, painted by his ex. It looked very much like a self-portrait and she looked hot. I crafted a frumpy bikini out of black paper and blue-tac'd it on.