Cheek kissing departing. It is uncommon between strangers of any sex, and it may be considered offensive otherwise. It is standard for children and parents, children and grandparents etc., and in its "formal" form it will be two kisses, one on each cheek. It may be a standard formal form of greeting in special events such as weddings. However, in Portugal and Spain, usually, women kiss both men and women, and men only kiss women (so, 2 men rarely kiss). In Portuguese families men rarely kiss men (except between brothers or father and son) , the handshake is the most common salutation
Cheek kissing between close friends and is sometimes treated offensive. In Romania, cheek kissing is commonly used as a greeting between a man and a woman or two women, once on each cheek. Men usually prefer handshakes among themselves, though sometimes close male relatives may also practice cheek kissing. In France, where the custom is called "faire la bise", the cheek kiss came under scrutiny during the H1N1 epidemic of 2009. A popular French joke states that you may recognize the city you are in by counting the number of cheek kisses, as it varies across the country. It is very common,