1. Gasoline
2. Nail polish
3. Rubbing alcohol
4. Your S.O.'s hair
5. Sharpies
6. Glue
7. Chlorine
8. Bonfire
9. A blown out match
10. A blown out candle
11. Tennis balls
12. Inflatable pool toys
13. New books
14. Your own body odor
15. Rain on the street
16. Bleach
17. Drywall
18. Shoe stores
Disclaimer: In no way are we saying people should go out and sniff this stuff regularly.