Sell also: Deuce
• Noun: the cardinal number that is the sum of one and one or a numeral representing this number
• Adj: being one more than one; example: "he received two messages"
It takes two sides to make a deal, two sides to negotiate and two sides to make it go bad.
One and one is two, and two and two is four, and five will get you ten if you know how to work it.