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When one or both partners in a committed relationship become aroused during discussions regarding engagement or matrimony; arousal will occur despite a lack of sexual advances on either part.
Caitlin: "It was the strangest thing...Brian and I were talking about getting engaged the other day, and all of a sudden he had a raging hard on."

Carole: "Uhh, yeah. That's because he has a bad case of Ball and Chain Syndrome."
by C.P.Q. October 06, 2009
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