What's the meaning for being a couple?

What's the meaning for being a couple?

So, I've been thinking about it, mathematically -- the way I like

You see, being couple means you gotta spend money over time to please your mate, so;
BEINGACOUPLE = MONEY . TIME

And, people said that "Time is Money" so;
BEINGACOUPLE = MONEY . MONEY

BEINGACOUPLE = MONEY²

Also, people said that "Money is Root of All Trouble", so;
MONEY = √TROUBLE
MONEY² = TROUBLE

so, we can conclude that :
BEINGACOUPLE = TROUBLE