Different rules on Kissing and hugging

I have noticed that kissing , hugging and hand holding are received diffently in different cultures and even rules vary in different circumstances, I attended the funeral of a very dear friend on Friday in a city called Leeds . This city is no more tolerant or intolerant than most UK cities but I probably wouldn't be affectionate in public with another man in the street, however when we were at both the church and the cemetery men hugged and even gave each other on the cheek or a peck on the lips something they normally wouldn't do in front of others , what are other members thoughts on this