Does Post Malone write his own lyrics?

This image appears in the gallery:
26 facts you need to know about 'Circles' rapper Post Malone

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 25 images

See the full gallery: 26 facts you need to know about 'Circles' rapper Post Malone