One scent a day is the rule.
"Hand-blending and filling today at the perfume shop, many many bottles of my new Pineapple Musk. Just magical. Days when I fill perfume bottles precludes all other fragrance development activity. The fragrance being filled on a particular day overwhelms my senses completely from body to brain and I have to hold off working on any new formulations or tinkering with concentration levels. One scent a day is the rule."