Marital entanglement

Quantum mechanics is not known to be significant for macroscopic objects, but here is an attempt:

For the ultimate in a nondenominational wedding ceremony, consider a quantum entanglement. The ceremony, developed by conceptual artist, Jonathon Keats, is borrowed from quantum physics, where when two or more subatomic particles become entangled, they behave as one.

Keats has designed an entangling apparatus, which, when situated in a sunny window and exposed to the full spectrum of solar radiation divides pairs of entangled photons and translates them to the bodies of a nearby couple. ...

According to Keats, the couple won't know to what extent they've become entangled, because any attempt to measure a quantum system disturbs it.

"The quantum marriage will literally be broken up by skepticism about it," he said.

This is pretty wacky, but it is not too far off of what some interpretations of quantum mechanics allow.