A very interesting tidbit about the ceremony that I didn't know was about the kiss. There, on page 356, is a little box that explains this tradition:
"Behind the tradition"
"You May Kiss the Bride"
Why does a wedding ceremony end with a
kiss? A kiss was long believed to be the
medium for the exchange of spirits, where a
part of the bride's soul joined the groom's
soul, and vice versa, truly uniting the couple
as one. In some cultures, a kiss literally seals
the wedding contract, while others a kiss is
not required. Most people just think of it as
an expression of love."
Thinking about the study of Theology of the Body, we can safely say that as "soul bodies" we are sharing our soul with the other. Our bodies are the outward sign of our soul, which is who we truly are. To be more clear,
"the sacramentality of the body is a visible sign for us of invisible realities concerning God and the deepest meaning of our existence. Our bodies make the invisible love of God visible."
from TOB for Teens, page 20Leader's guide.
So for this reason, we should take extra special care of our bodies and how we use it.