My heart to you is given: Oh, do give yours to me; We'll lock them up together, And throw away the key.

The speaker offers an exchange of hearts as a figure for mutual, exclusive commitment: love is not merely declared but reciprocally pledged. The image of “locking them up together” suggests a desire to make the bond secure against outside claims or future wavering, while “throw away the key” intensifies this into a vow of permanence—an intentionally irreversible union. The simplicity and sing-song cadence evoke popular nineteenth-century sentimental verse, where courtship is framed as earnest, morally legible devotion rather than psychological complexity. Read charitably, it celebrates trust and shared custody of one another’s inner life; read skeptically, it hints at possessiveness disguised as romance.