"A couple takes a
padlock and gets it engraved with their names, date they met, married or
the date they attached the padlock to the bridge, heart shapes and in
some cases small poems.
Then the couple goes to the bridge, which has a
pedestrian walkway or path, and attaches the padlock to the bridge
railing. To seal the deal and signify that their souls are eternally
locked together the couple then throws the padlock key over the edge of
the bridge into the river.
Symbolically the couple has joined together
forever and thrown away the key so that their love will never end just
as the padlock will never be opened."