act 2 scene 6

Basically Gratiano says that young love looks pleasing but after going through the test of time, lovers can look withered and tired. He uses the metaphor of a new ship going out to sea all shiny and new but limping back weathered and worn,

"The scarfèd bark puts from her native bay,
Hugged and embraèd by the strumpet wind!
How like the prodigal doth she return,
With overweathered ribs and ragged sails
Lean, rent, and beggared by the strumpet wind!"