Sexual declaration used in poems? (5)

I believe the answer is:
iambi
'sexual declaration used in poems?' is the definition.
I can't tell whether this defines the answer.
'declaration used in poems?' is the wordplay.
'declaration' becomes 'iamb' (I can't justify this - if you can you should believe this answer much more).
'used in' means to look at the middle letters (the letters used on the inside of the word).
'poems?' becomes 'laies' (lay is a kind of poem).
The middle of 'laies' is 'i'.
'iamb'+'i'='IAMBI'
Can you help me to learn more?
(Other definitions for iambi that I've seen before include "Poetic feet" , "Metrical units with alternating long and short syllables" , "Poetic pieces" , "Concierto de Aranjuez composer" , "Feet of two syllables (one short and one long)" .)
