Sometimes parents — especially mothers — also like to call their daughters “Maus” or “Mausi”. As you can see, adding the vowel i at the end is a popular thing when it comes to German terms of endearment.
Gender Neutral Terms of Endearment
Schatz and its variations, Schätzchen and Schatzi (“little treasure”) is the most common term of endearment in German by far. It is capitalized like all German nouns. Almost all German-speaking couples call each other this, and it's also commonly used with children.
Schnucki (darling / sweetie pie)
Liebling (darling)
"Liebling" is about as close as German comes to the English "darling." While the expression contains the word for love — "Liebe" — it's also borrowed for other purposes.
Schatz is the most common German term of endearment, according to surveys. Couples all over the country call each other this pet name or one of its many cute forms, such as Schätzchen (little treasure) or Schatzi (little treasure). It's also very common to use with children.
The most common greeting is a handshake with direct eye contact. Men usually greet women first and wait for them to extend their hand. Close friends may hug to greet and younger people may kiss one another on the cheek. "Guten Tag" (Good day) or “Hallo” (Hello) are the most common verbal greetings used in Germany.
Kindlein {n} babe (also: baby, small baby)
Schwester / Bruder – Sister / Brother
Many people in Germany will consider their closest friends to be Schwester (sister) and Bruder (brother).
Kindchen, das ~ Noun.
Guten Tag/Hallo/Tag (often pronounced 'tach'), (mein) liebes/süßes Mädchen/Kind. Fräulein instead of Mädchen would be ok, especially if the girl is at the upper end of the age range.
hat, the ~ Noun. headgear, the ~ Noun. bonnet, the ~ Noun.
Putzi. (das) baby [österr.] (das) baby [österr.], a dog name.
German. Ich liebe dich. (I love you.) Ich hab dich lieb.
Flirting In German: It's All In The Eyes
It just means sexy eye contact could involve a little more “innuendo” than usual. This does not mean it'll necessarily be accompanied by a smile, or that you'll be invited with a lingering gaze. A favorite move when flirting in German is the “look, but then quickly look away.”
The formal version of how are you in German is Wie geht es Ihnen?