There is no pot so bad but it finds its lid

This could refer to people finding their match in the field of matrimony. It is often surprising to see some relationships and to wonder what on earth did she see in him or vice versa.

There is a science to how people match up and we all tend to recognise when a couple are a good match and when they are not. Some unlikely pairings seem to work and this might be down to the easy going nature of the individuals or it is based on mutual need. The man wants a good looking girl, the woman wants a good provider, and they are willing to overlook other incompatibilities. They don’t belong together but they rattle along somehow.

Lucky indeed are the couple who naturally match, and whose circumstances are in perfect harmony -- where the pot and lid have been made for each other.