A beautiful wife, or thoroughbred, who is broken or has issues. Like a rescue purebred you cannot otherwise afford or deserve once purchased you realise he/she has had a traumatic life and will require extra attention and care for the life of the marriage.

When you eat dirt for the first time and leave your family to build a shack in the woods

When you marry a woman from a poor country and bring her back to your rich country, such as the United States, thereby rescuing her from poverty and oppression.