Lyric discussion by cmarkged 

Cover art for Smashing lyrics by Libertines, The

my guess as to what it means:

the monkey whore i think is a man who gets a woman pregnant, but then leaves her, because she saw something under the bed, havent got a clue what that means then because the father has left she feels the baby has sort of died in spirit and then the french bit shows how the relationship started as just something casual, but it moved into something more for the woman but remained casual for the man - the woman says: "i love you, but it does nothing".

but yeah that could be all wrong. very good song