A common example of this is the US servicemen that had come back from tours of Iraq or Afghanistan telling stories of how lovely and "welcoming" the locals were.
E.g.: the locals would make a token offer to the soldiers, expecting them to politely refuse.
The Americans would take that offer at face value and accept, to the surprise of the locals.
Someone from I think maybe Iran told an anecdote once on HN about visiting home with someone and eventually telling people "Don't offer him anything. He doesn't know how to say no."
Indeed, in many cultures like Turkey and in my experience of India, people will insist that you take something, not expecting you to decline at all. It is seen as almost disrespectful or insulting to the host to decline, unless you explain a reason or decline after multiple times of asking.
E.g.: the locals would make a token offer to the soldiers, expecting them to politely refuse.
The Americans would take that offer at face value and accept, to the surprise of the locals.