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 (Southern), elderly women may be cheek kissed by younger men as a gesture of affection and respect. In Québec, cheek kissing is referred to in the vernacular (Québécois) as "un bec" (""donner un bec"") or "la bise" (""faire la bise""). Whether francophone or other, people of the opposite sex often kiss once on each cheek. Cheek kissing between women is also very common, although men will often refrain. Two people introduced by a mutual friend may also give each other "un bec". Immigrant groups tend to have their own norms for cheek kissing, usually carried over from their native country.