When you're sealed up for in a kayak for several days on end, bad things are going to happen. The cockpit of the 'yak becomes a chemistry lab from hell.
The combined fermentative effects of sandals, feet, mud, water, heat, sweat, and god-only-knows what else is enough to knock you down. All those individual smells combine into a sort of toxic cocktail suitable for neither man nor beast.Sometimes I just cringe when I'm about to pop the sprayskirt off. Knowing the noxious gasses about to be released is enough to give anyone pause.