<human>:  In the song ‘A Man in Love’, where does the word ‘so’ come from?
<bot>: The word “so” is a contraction of the Latin word “se” which means “the” or “that”. It is often used in English as a substitute for “than” or “as”, and it is a very common word in English. In this case, the word “so” is used to indicate that the person singing is in love with the object of his/her affection.