The alcohol found in perfume, which Web Poison Control says can make up between 20 to 95 percent of a scent, is enough to cause trouble if it is ingested because alcohol can cause blood sugar to drop below normal. A spritz or two in the mouth isn't normally a cause for alarm, but If more than 30 milliliters is consumed, the alcohol in perfumes could be enough to get drunk on; and people (especially children) can get sleepy, develop slurred speech, and have difficulty breathing. 

Perfume ingestion can even cause someone to pass out or have a seizure. Because perfumes were not created to be eaten, they can even have toxic alcohols like the ones found in windscreen washer fluid.