Well, when you're dealing with a tax system that taxes you as individuals rather than a family, it can lead to some rather peculiar behaviour. (moneysense.ca)
However, Norwegians are quite reserved and greeting everyone you meet with a cheery «Hei» might be viewed as peculiar behaviour. (greatrail.com)
The third time she does it, she realises how peculiar her behaviour must seem. (housegoeshome.com)