Do you think the way the bride and groom feed each other wedding cake is an indicator of how long the marriage will last?

I have attended quite a few weddings and have wondered if there might be some indicator of whether the marriage will last or not. It seems like the bride’s and groom’s actions during the traditional “feeding of the cake” can be a sign.

If the couple treat each other with respect, eg. carefully cut small pieces and try not to get cake or frosting on their new spouse’s face or clothes, the union will last.
If one partner smashes the cake into the other’s face, that is a precursor to an abusive relationship down the road.
If they both do it, the union will not last.
On the surface, this is such a small, playful part of a wedding day. Do you think unconsciously, there is might be more to it? Both are under a lot of stress. The bride has been planning this event for months. She has spent hours and considerable expense on her clothes and makeup to be the most beautiful she can be. The couple is surrounded by long time friends and relatives. The new spouse is meeting many of them for first time. This day lays the foundation for the years ahead and they are surrounded by photographers recording the event for posterity. This is precisely the time when they most need each others’ trust and support. Do you think smearing cake and frosting onto each other face suggests the absence of both?
Are any statics available? What did you do, and how did it turn out?