"I saw that, you didn't actually grow the tooth through the gums," Addy says. "That's fine for teeth but it doesn't help with figuring out if you can do horns. Hm. If you're nervous about it hurting, maybe add a fingernail somewhere that hasn't usually got any. You can start with nail matrix, that's the stuff under the nail itself, and grow nail from that, should be nice and smooth."