Moon is adaptive, have phases of waxing and waning. It governs water and moods. Cancerians are also like that, they easily get gel with the nature of others. Always like to be with someone. Emotional, sensitive, shy, attached, sympathetic, caring and nurturing by nature.
Fourth house indicates about domestic happiness and Cancer sign is fourth in zodiac, home, family and its comforts are important for Cancerians.
If Cancer sign is in affliction, they become possessive, depressed, moody and peevish. They close themselves in a shell.
Cancer persons are loyal and have deep feeling of responsibility and expect same from others too. They spend money prudently and accumulate wealth for future use.