What is the origin of the idiom "sweep someone off one's feet" and when to use it?

Its origin is unclear, but it is believed to have originated in the early 20th century. Some suggest that it may have come from the world of dance, where a partner may "sweep someone off their feet" during a particularly graceful and impressive dance move. Others suggest that it may be related to the traditional practice of carrying a bride over the threshold of a new home, which could also be seen as "sweeping her off her feet". Regardless of its origins, the phrase remains popular in modern usage and continues to be used to describe moments of intense attraction or admiration.