Who's the puppy?

SILVER: Hey, pop. You know how we started the day at the dog park? And how shocked those people looked when you told them that I was 10? That one lady even said “He’s 10? The way he looks and bounces around? I thought he was a puppy|” 10 is like 70 in dog years, right?
ME: Yes it is.
SILVER: And then like 2 hours later when you were buying groceries, that cashier asked if you qualified for a “senior’s discount”. You’re 51. That senior’s discount doesn’t kick in until you’re, like, 60, right?
ME: What’s your point?
SILVER: My point is that I look younger at 70 than YOU do at 51!
ME: I don’t want to look at you right now!
SILVER: Really? Everyone else does!