I know exactly what you mean daffy but I think it depends on who says it & how it's said.
I've always been a skinny minnie too, I've had all the insults & as a teenager/ young woman it often got me down. Now I'm... erm... mature in years, but not in necessarily in behaviour, I don't really care & laugh at myself. My friends on here - they know who they are! - call me stick-woman, haha. I have actually gained a bit of weight recently but it keeps them from calling other people names :o)
What I strongly object to though is this 'real woman' phrase....grrr...it makes my blood boil! We're all real, & as you say daffy, we all have feelings.