I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
My mom insists the old, old bed frame that I'd collaged up was broken. Or she did right after the new one had actually fallen apart - or y'know, really, actually broken.
Mom: "I don't know how you broke it."
Me: "Well, I was really fat back then..."
There's this long pause, and then she starts chortling.
Mom: "You were. You were so fat."
That diffused the situation quite nicely without it devolving into a fight. People are horrified by this story. I find it hilarious. I called myself fat first, my weight had on bearing on how much she loved me (but being a good MD, she got nervous about my weight and health issues, and that's all she cared about), and I think she felt she could say it because of the 'were' issue. (I'm no longer that fat.)