This sound is from Valentine's Day Soundboard

In Italy, Saint Valentine's Keys are given to lovers "as a romantic symbol and an invitation to unlock the giver's heart" The legend claims he wrote the jailer's daughter a letter signed "Your Valentine" as a farewell before his execution.
See also: Valentine's Day (2010 film), Saint Valentine's Day Massacre, Valentine's Day in India, Valentine's Day (disambiguation), On Valentine's Day, and Valentine's Day in Quahog.