Why do otters rub their cheeks?

Related questions

1. Do otters eat rabbits?
2. Do otters need water?
3. Do beavers bite humans?
4. Where do otters sleep?
5. Do otters have fleas?
6. Can you eat otter?
7. Do otters drown dogs?
8. Do otters and dogs get along?
9. What can kill a alligator?
10. Are lake otters dangerous?

Tags

1. #those
2. #glands
3. #their
4. #according
5. #waterproofs
6. #cleans
7. #otters
8. #cheeks
9. #continually
10. #gather
11. #there
12. #sleek
13. #along
14. #brush
15. #because
16. #secrete
17. #research