When I was a teenager, my mom dated a great gentleman named Harvey. Harvey was a kind man and was really the only father figure in my life. Although, Harvey left this world far too soon, it wasn’t before he introduced both of us to a new world under the sea.
We both took an Open Water course with Dixie Divers in Fort Pierce Florida. The course, taught by Mark Shaw, occurred over several weeks. I remember studying the book from cover to cover and mastering the PADI dive tables. I found every aspect of the course and certification dives exciting. 
The most memorable dive was the Christ of the Abyss in John Pennekamp State Park in Key Largo, Florida. At that time, I do not believe it was covered in Fire Coral.
I also remember we trained in buddy breathing and at that time we only had a single 2nd stage regulator each. I also remember that Harvey would take a while breathing before I got the regulator back. This didn’t matter much since I could hold my breath for a long time as a teenager. Also, at that time I don’t remember being told to continuously exhale while the buddy is using the regulator. However, it could just be that I had forgotten that detail.
Unfortunatley, after the certification dives, Harvey became ill and it was many years before I returned to world he introduced me to. Thank you Harvey. I don’t know if I ever told him that.