Cooking and Clothing

I always read that you aren't supposed to sleep in clothing you cooked in. I'm wondering how many of you realistically adhere to this rule.

I can say that I don't, and I don't worry too much about it, but then again, I'm not frying fish or cooking steaks on the grill. I'd assume it was a useless endeavor anyway if you have hair on your head, since that will absorb just as much odor as your clothing and you're not changing out of that. Just curious if that is an overabundance of caution, or actual good advice. Just curious what you all thought.