Hi, I LOVE lavabending and everything about it. When showing it to my friend, he also loved it, but complained about how they couldn't cool Lava like Bolin. I told him it was because of heat control. He once again brought up Bolin and such. The best reasoning I came up with is maybe the ability to cool lava is unique to him, as Ghazan could heat up lava. What do you think is a good, In-Universe explanation?