Recognized

Question for everyone. I recognized a good friend and his wife on here. Should I say anything to him? Don’t wanna embarrass him or anything
I recognized a couple who worked for me. When I had the opportunity I told them I loved their pictures. Didn’t say anything else. Took them about an hour to realize what I was referring to. At first she got mad that I commented on her pictures even though I wasn’t explicit about what I liked. About an hour after that, I was invited over to their place after work.
An offer I took them up on many times over the years.