For years, men have wondered why women are so overly-emotional, crying if they don’t get a phone call right after a date or if they don’t get flowers on Valentine’s Day.

Now the answer is finally revealed — they wear the wrong bra size

According to a national fit study by Wacoal, a bra company, eight out of ten women in the U.S. — or nearly 90 million women over the age of 18 — are wearing the wrong size bra. The Wacoal study, conducted among 750 women, also reveals that the most common mistake made by women is wearing a bra in which the band is too big and the cups too small, with an estimated 35 million women making this mistake alone.

Liz Smith, director of retail service for Wacoal suggests a bra fitting. She notes that:

"A professional bra fitting done by a trained fitter can be a fun and informative experience."

Men, do the women in your life a favor.  Tell them today that their bra doesn’t fit right.  They’ll love you for it.