The __, scratched occasionally Monroe film? (5-4,4)
I believe the answer is:
seven-year itch
(Other definitions for seven-year itch that I've seen before include "Desire to be maritally unfaithful" , "Tendency towards infidelity - scabies" , "Desire to be unfaithful after some years of marriage" , "Scabies - which is said to make married men unfaithful" .)