One summer while staying at my grandma’s house, I was planning a trip. We talked about how I might drive out to NYC instead of flying. Then I thought about taking the train and mentioned to her that it was only about a 15 hour train trip (or so).
“How on earth can you sit that long?” she asked.
I cocked my head, rolled my eyes, and within a few short seconds we both burst out laughing.
That’s how I like to approach the instances when people forget. Some people, however, take offense in situations like that and it’s not healthy and not acceptable. People slip up all the time. It doesn’t mean anything. Laugh, and let it go.