It is nice to see you and your son bonding moment at a coffee shop. He was excited to try it the first time. I also like coffee with savory pastry especially when I am very hungry. Your son enjoyed it, perhaps he will become a true coffee lover like you. My first taste of espresso was in college but I didn't finish all of it heheh...
It's very nice to share with him, especially my favorite caffeinated drink, for being his first time, he loved it, the barista had something to do with that taste, he prepared it very smooth for him.
I also have that anecdote about my first espresso at university, I only drank coffee at home or whatever I prepared. I couldn't finish it just like that, I asked for it to be mixed with milk 😁, and I was able to finish it happily☺️