Why do cationic ingredients like BTMS smell fishy?

Cationic ingredients – those that are positively charged used as conditioners, like BTMS or BTMC – can smell fishy. It’s not a sign of the quality of the ingredient, it’s just what happens because of the nitrogen. It’s a you thing — like smelling or producing asparagus pee, smelling ants, or tasting cilantro like soap,…