my mum always says...

Nothing bad that doesn't bring something good with it.
And she is so right!
For instance when you have a killer cold that won't let go of you and you seriously are starting to believe that you never will get well again...
...you don't have to worry about being able to taste the food at the Chinese supplier lunch, so you don't have to feel like a spoilt Westerner.
...you can't feel all the ugly smells when walking through a fish market.
...you make people smile at you because they think you sound so funny when you speak with that stuffy nose voice.
...and you, as the man you share your bed with so happily pointed out, can't smell his farts.