Many wedding customs have pagan origins from what I understand.
Yes, let me tell you a funny story :
It was two young people, very sympatics, french JW's, who wanted to avoid all the pagans thing in the wedding ceremony.
That's why, they choose to not go at the catholic roman church, pagan place and false religion building. They asked too to the guest to not throw the traditionnal handful of rice .
Everything went fine. The bride was very pretty under the white veil and the beribonned bouquet of flower she had in hands was sumptuous. And the bridesmaids was very pretty too.
After they said "Yes", they put tenderly the wedding ring at the left ring finger. The day after they jump in a plane for a great honeymoon.
Arrived at the hotel, the young husband, very courteous, take his new wife in the arms to enter in the honeymoon suite, where they do what they had to do (it's no more our concern)!
It sounds very classical, isn'it ?
But they forgot some détails :
1) The veil : It was, even before the wedding dress was used, designed to mask the face of the bride to the evil spirits, meant to be attrcted by the happiness of the other people
2) The bouquet : this bouquet is meant to guarantee the marital ecstasy, because the flowers are a symbol of love and fecondity.
3) The ribbon : the ribbon of the bouquet are meant to be a luck symbol.
4) The bridesmaids : They are here to protect the bride from the demons and other surnatural power beast and to empeach his kidnapping.
5) The ring at the left ring finger : It comes from an ancient greek believing, who states that a blood vein, called the "vein of love" comes from this finger to the heart.
6) The honeymoon : It comes from the time of weddings by rapt. The guy was taking the wife very far from her family until the parents cancel the research. And in the same time it was useful to escape from all the evil spirits who wanted to destruct the happiness of the new couple.
7) To carry the wife to enter the honeymoon suite : it's a tradition meant to thwart the misfortune. It empeachs the bride to stumble and to war off bad luck