I just replied to the post 'human heads' and it also partially applies to your question of the hair chewing. I hadn't thought of the fragrance idea, but I know mine aren't too thrilled when I apply stuff too my hair, that's usually when they exit the bathroom, quickly I may add! I may just have a 'bad' flavor though, or they don't like getting a shower of particles. I would just take it as a sign of love. I don't think they could get enough chemicals ingested to hurt them.