I wear shorts for serious cooking. Will do cold food, toaster, microwave nude. There is a man who calls himself the bear naked chef who does video cooking demonstrations wearing only a tiny apron that covers about as much as very short shorts in front but leaves the entire backside exposed.
I cook naked almost as much as while clothed. Almost never have shoes on in the house and have had the knife scare more than once. No injuries there, but I did spill some boiling water on a foot that caused a nasty burn. I believe that it would not have been as bad had the foot been bare instead of with a sock on it. Frying is another thing all together. I tend to do that on the back burners. It keeps the spatter farther away and I've never needed an apron.
I cook breakfast naked every weekend. I don't wear an apron, but I don't do a lot with splattering foods. I'm extra careful handling hot liquids or knives. I have a sister-in-law that dumped boiling water on her feet and had months of recovery from the burns. I have a nephew that dropped a knife and had lots of stitches in his foot!
But now after cooking naked so many times, I just can't stand to cook clothed.
My wife and I always cook naked and never give it a second thought. Actually, at home, were always nude so it would be quite an imposition on our naked time to wear even an apron. Im extra careful draining the pasta water and barbecuing outside and so far (5 years) neither of us had a mishap.