"缺宅男女" (Lack of Home Love) seems like it could be the title of a TV show, movie, or perhaps a colloquial term used in Cantonese. However, without more context, it's difficult to provide a precise meaning or explanation.

"Caveman" or "cave-dwelling person" is not directly related to this phrase. If you have any additional information or context about what you're asking, I'd be happy to help further!