Spent the weekend in the mountains with some friends, they know for some time we don't eat bread and try to eat healthy but they didn't know why.
So the discussion came during lunch in a restaurant:
Friend: So, why don't you make your own bread?
Me: Well, we don't eat bread.
F: Yeah, I know, but you don't eat bread because the one in the shop has additives. If you make your own, you know what you put in it.
M: No, we don't eat bread because we think grains are unhealthy.
and continued to eat the bread in the hand.
I didn't offer to explain why but I also didn't get a question back so I assume they don't want to know or just think we're wackos!
The easiest explanation about this I gave to my work colleagues. I told them I have celiac/gluten intolerance so if I eat bread I'm sick (I never really developed any symptoms - I was never a regular bread/pasta eater but I did have the ocassional pizza/sandwich - but it's a good excuse). No more questions asked. It didn't really cast any wisdom on them, but at least I didn't have to explain every time why I don't like sandwiches.
I do sometimes like to make fun of them eating bird food. Oh, man, Dutch people love their bread - having sandwiches 3-4 times a day!