Rubbing your wrists together after spraying blends the fragrance and helps it absorb.
Friction generates heat. Heat accelerates evaporation of the most volatile compounds — the top notes. What rubbing actually does is destroy Act 1 before it has a chance to develop.
The top note compounds (citrus monoterpenes, light aldehydes, fresh herbs) are the first casualties. You lose the opening sequence. The fragrance jumps directly into a compressed, mid-stage version of itself. It did not blend. It skipped.

WHAT TO DO INSTEAD
Spray onto clean, unrubbed skin. Let the alcohol carry the top notes off naturally. Do not touch the application point for at least 60 seconds. If you are testing two fragrances, spray on opposite wrists and wait — never rub. The Three Acts are a sequence. Rubbing collapses Act 1 and forces an inaccurate read of Act 2.
