Hole
The hole is, quite literally, a void or an emptiness. It is Yonic. In the earth, it is a symbol of female fertility; in the roof of a temple or dwelling, it is the upward opening into the heavenly realm. Information taken from: Online Symbolism Dictionary
Sexual symbol for the vagina. The unconscious. Fears of 'bottomless' situations in life. From - Dream Dictionary.
Songs referenced:
Butterfly