See, I don't want to hurt your feelings, but - see what can happen?
I have these second store plates that are dear to me, not worth much
but I took time and pains to hand pick these,
and since they are not new,
putting them thru a dishwasher would ruin them for sure
I certainly can understand your POV - it can be viewed as being very polite to pitch in without being asked,
but don't you think if the host says "oh, please sit and..." it could be a clue
that, after all, it IS better to ask first?
It, however, is very nice of you to sit down and relax as I had guests who insisted to help despite me telling them to please sit down!

My problem - I can't talk and cut stuff at the same time, grrr
and some pple don't get this.
they ask me hundred question, and in the end it takes me twice as long to do a simple task.
So, please, my guests, ~ SIT DOWN and RELAX, thanks!
Fuzzy