I never really used to get it and I thought it was weird, but now that I'm a mom, I get it. There's big developmental differences between a 12-month-old and an 18-month-old, and both of them are technically one-year-old, like if you're going to say it like that. But it's very, very different, and I've had moms say something to me, to me be like oh how old is your son I'll be like two and then they like make a face because they think he's really advanced.