Foreigners should make an effort to be considerate of local culture, and it’s important to dress and behave modestly in public. For both men and women that means covering shoulders and knees (there is no need for women to wear a headscarf), avoiding public displays of affection between sexes, not being visibly intoxicated, and so on. Note that not all Arab men and women shake hands with those of the opposite sex; for men, if in doubt, it’s best to place your right hand on your chest when greeting an Arab woman. A traditional greeting among Qatari men is rubbing noses.