I was at a meeting a couple weeks ago out of town, and I was called in to inspect the sheets in a room for others as they believed they were dirty, and being the innkeeper that I am stated clearly they were cleaned, set-in, blood stains, to which they all said "Ewwwww" and I just kind of shrugged and walked out. My expertise was needed and the stains were clean stains. Not what they wanted to hear, but better than the alternative, I told them.
(oh what they don't want to really know about hotel rooms, and I won't be sharing with them anytime soon, I did say "remember at a b&B the innkeeper is 100% on top of inspecting the rooms and many times cleaning them him/herself.)