One might not automatically understand particular customs in other countries.

Though if traveling abroad - and especially on the cheap as with hostels/B&B's/camping etc. - I guess the lesson is that it's probably wise to actively enquire as to the terms & conditions of any establishment one chooses to book in at.

B&B's are very popular with people wanting a lower cost, active weekend break in an historical city or area of natural beauty, which will naturally be the focus of the majority of ones time and energy. But they are possibly less appropriate for an extended, and more leisurely paced holiday.