Hoping to get a general concensus about fluoride toothpaste. My DS is 2 and 1/2. He isn't really spitting out his toothpaste properly yet but I've heard this is about the right time to get him on fluoride. I understand too much fluoride ingestion is bad for him/his teeth. Currently he uses a natural (no saccharine, no fluoride) toothpaste that I LOVE LOVE LOVE. It also comes with a fluoride option. Is it time to make the switch?