That's so sweet! He obviously never minded the lessons you were sharing (albeit inadvertently). Its very nice that he said something, too. That kind of thing makes you feel good. Reminds me of something that happened to me.
I have a friend whose income is multiples of my own and who is also a lot spendier than I am. We don't judge each other and have lots of common ground, but we both know that the other is just, well, different about money. One time she had been looking at buying a super expensive watch (several thousand dollars, maybe tens of thousands, I don't remember exactly, but a lot). I am sure that my eyes went wide when I saw the first one she showed me online, but I said, well, if you love it and can afford it and will wear it all the time, go for it. I later ran across a watch online that looked like something she would like and that happened to be on the lower end of super expensive, and I sent her a link to it. She replied saying it looked great but that her financial coach would be disappointed in her if she bought it -- and that she was resisting buying a watch at all. I asked her who her financial coach was, out of curiosity b/c she hadn't mentioned that before. She said that it was me! That made me smile.