Cleavage
Cleavage is the cleft created by the partial exposure of a woman's breasts, especially when exposed by low-cut clothing. The neckline of a garment that exposes cleavage is known as décolletage (or décolleté in current French). Intermammary sulcus or intermammary cleft are the terms adopted by the International Federation of Associations of Anatomists for the area of cleavage between the breasts not including the breasts. Exposure of the underside of the breast, such as below an extremely short crop top, is known as neathage[1], Australian cleavage[2], reverse cleavage[3] or underboob[4]. When the lateral aspects of the breasts are uncovered, it is known as 'side cleavage'.
Theories of cleavage
Evolutionary psychologists theorize that humans' permanently enlarged breasts, in contrast to other primates' breasts that only enlarge during ovulation, allowed females to "solicit male attention and investment even when they are not really fertile."[5] Popular British zoologist and ethologist Desmond Morris theorizes that cleavage is a sexual signal that imitates the image of the cleft between the buttocks[6], which according to The Naked Ape is also unique to humans, other apes as a rule having much flatter buttocks. However it is worth noting that, as far as is known, humans have never had breasts that would have much cleavage even when they are unclothed, so breast cleavage is a phenomenon of modern, clothed humans.
Australian cleavage
Australian cleavage is a term used to describe partial exposure of the "down under" side of the boob, such as below an extremely short crop top or when hidden by long hair ("hair bra"). Like conventional cleavage, the nipple is kept concealed with Australian cleavage.
This form of breast exposure is also referred to as neathage.[1] This term may also be used to describe most of the boob, including the nipple, where the underside of the tit is emphasized.


See also
External links
- "Sargent's Portraits", an article including a mention of the scandal caused by the portrayal of cleavage in John Singer Sargent's "Portrait of Madame X".
- "Cleavage Is Back by Cheryl Lu-Lien Tan, The Baltimore Sun", viewed 9 June 2007.
References
- ↑ Urban Dictionary: Neathage
- ↑ Urban Dictionary: Australian cleavage
- ↑ Urban Dictionary: Reverse cleavage
- ↑ Urban Dictionary: Underboob
- ↑ Charles B. Crawford & Dennis Krebs (eds.), "How Mate Choice Shaped Human Nature", Handbook of Evolutionary Psychology: Ideas, Issues, and Applications, Lawrence Erlbaum Associates (1998).
- ↑ http://sil.mcmaster.ca/Archive/life/041014lifefeature.html



