My 5 year old keeps calling all of his female teachers beautiful…

I got a call today saying he’s coming up to them multiple times a day saying things like “your hair is really beautiful” “your shirt is pretty” “ you are so pretty”. I’m going to talk to him about it, but I dont know how to word it. He’s 5… he’s not hitting on them. I think he’s just trying to be nice. Am I in the wrong thinking that?