It stands to reason that, like a Valentine's Day heart, a red heart emoji means love. But what does a white heart emoji mean?

In it, only their arms are showing —and the actress added an in-love emoji between them and their dinner plates. "Last night I posted a photo that caused a lot of speculation, it's time I tell ...

Of the six billion emoji that are sent globally every day, around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent are sad expressions.