If people are in a rough patch, or what researchers call "a weakened state" in their relationship, they are almost five times more likely to break up within the two weeks surrounding Valentine's day than any other weeks of the year.
They are, in fact, five times more likely to break up than any other weeks of the year - that's according to a 2014 study recently discussed in Psychology Today.
Dr Kirsty Ross is a clinical psychologist at Massey University, she talks to Mark about the Valentine's Day break up trend.