Term (in Germany rather "brotherhood drinking") for the widespread custom in many countries to use the familiar form of address "Du" with a glass of wine or sparkling wine(beer, schnapps). This is usually suggested by the older person or, in the case of a mixed couple, by the lady. Today, one drinks from one drinking vessel each. With the arms holding the vessel, one reaches through the crook of the other's arm. After a sip, one then gives a kiss on the cheek or on the mouth, depending on one's confidence. Then you introduce yourself with your first name. It is possible that brotherhood drinking has its origin in the custom of drinking, which was widespread in the Middle Ages. In this case, the person who wanted to offer the brotherhood to someone spoke to him and drank to him. The cup was filled again and then the person addressed drank from it.