I like how you say we're all the same race, as in the human race. It's very true, and so many are so quick to forget or ignore that. Mixed couples may have some cultural issues to overcome, but as you say it keeps things interesting. We can all learn from each other.
Dad's hand is doing well since his surgery, but his case was severe so any improvement is drastic improvement for him. I hope yours never gets that bad. He could barely open his hand.