I think it's well accepted that mood / mental state can affect performance. It's also well accepted that smells can affect us emotionally. I think the burden of

I think it's well accepted that mood / mental state can affect performance. It's also well accepted that smells can affect us emotionally. I think the burden of proof is on anybody who doesn't think smells can affect performance. They should, ideally, have to perform this work while sitting in a smelly public bathroom.