Top Definition
A theory derived from the notion that both male and female beings have an eternal fascination and attraction to the female's breasts, no matter the being's sexual orientation.
Male- "Wow, you have got some swell tits."
Female- "Wow, I do have got some swell tits."
Profesor- "That's the Theory of Breastitivity.
by mhm jharty September 20, 2011

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