Dirty Grout

BF, "What color grout do you want?"
TMF, "Hmmm...I don't know, a dark color?  Something dark so it won't look so dirty when I don't clean it often."
BF, "What?  Like a gray?"
TMF, "Sure!"

I walked into the master bathroom as BF was spreading the grout mixture.

Whoa, it was pretty crazy.  It looked as if he spread black tar all over the tiles. 

I know, I know.  The dirty-looking grout will wash away with a good scrub, but it was still a shocking site.