Flickr Feature Suggestion

mom and dad
Originally uploaded by earthdog.

I would like to seem mega-tags on flickr. By mega tags, I mean second level tags. The photo above is of my Mom and Dad. I would like to only have to add 'mom' and 'dad' tags to this photo. I would like this photo grouped with family, women of my life, and backhome. I want one tag to group with the other right away. I think having a second level tag would give me more ways to orginize photos. I would also have to spend less time adding tags to photos.