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1.
When breasts are pulled apart instead of pushed together and still look glorious.

Bras prohibit anti-cleavage

Breasts may be pushed to the body for added glory.

Small boobs don't count.
A woman with an unbuttoned button up shirt with nipples covered has fantastic anti-cleavage.

Hand bras and Hair bras.

Scarlett Johansson.
by hankiespancakes October 15, 2011