I've already acknowledged that it was silly, awkward, unnecessary... But it was just an old person trying to make a child feel grown up, like millions of grandparents do, all over the planet, every day. "Haven't you gotten very grown up..?" is something every child in Ireland (and everywhere else, I'll wager) has heard, repeatedly, from family as they grow up, since the dawn of time... But, as I've said many times before, you already know this.
You turning it into predatory grooming is utterly twisted, and shows your true intention here, while you hide behind the lie "I don't care, it's not about feelings".
Even Ross acknowledges that it's not grooming. Only you say that word, because only you want it to be that, so that you have something (that doesn't actually exist) to beat him with.