Who sang "Don't Marry Her (Fsck Me)"? Was it The Beautiful South? That song always seemed to me to be hand-crafted as the optimally bad wedding song.

yup, it was them, they had numberious songs to which the lyrics deserve a closer inspection in order to get the full story

one song has a line something like "every penny doesn't fit in the slot" but the surrounding lines give it a completly different context....