Yes you can use coconut oil or vaseline or any water based lubricant to have anal sex. But kindly be careful while having anal sex as it can cause hemorrhoids, anal fissure, trauma to penis and STDs such as
HIV. So be very careful, if you develop any difficulty visit the ER at the earliest.
Next Steps
Follow the steps as advised
Health Tips
If condition persists or worsens visit the ER at the earliest