From the ArcaMax Publishing, Trivia Newsletter:
http://www.arcamax.com/news/trivia/s-192075-120153
Generations ago, it was considered lady-like for a new bride to be (or, to appear to be) hesitant to "give herself" to her new husband, whether or not she truly was. At their bridal chamber threshold, the husband would often have to carry the bride over to encourage her to go in. The tradition still is observed.
This news arrived on: 05/12/2007