When did everyone start potty training?

Rebecca • U.S Navy Sailor's wife. Married 12/30/15. First born on 01/02/17 Second Born 09/18/18 🧒🧒👨‍👩‍👦‍👦

My son is 16 months old. I started just putting him on the big boy toilet every 20 minutes. He’s been doing really great, but I don’t think he understands quite. what’s going on. He’ll sit on the toilet no issue, and won’t move for 20 minutes. But when I let him get up, and congratulate him for peeing he just looks at me like “huh?” Im not sure if I should continue or not :/