Co - Authoring Posts

Hi Guys,

Sincere apologies if this has already been stated:

I noticed you upvoted a blog post I recently made about traveling in Africa, thing is that road trip was done by two people, both who are now on Steemit and it go me thinking, we experienced that whole trip together, wouldn't it be great if there was a way to give co-author rights to a post so you share and rewarded steem? Almost like a way of acknowledging other contributors. Yeah maybe I should rephrase and suggest a box in which users can tag a co-contributor on a post so they receive a share of steem for being a part of the post?

Apologies if this has been discussed or there is already a way for that.