Jerry, I was not making fun of you. I often forget that there is a big difference between the humor of our cultures. I often laugh at my mistakes. (Last night, for example, I baked two pans of meatloaf. This morning I wonder what that strange smell was... Was someone fixing breakfast? No, it was the meatloaf I had forgotten to take out of the oven. What a dummy! LOL)
I understand your point of view, but language is not logical. We need to imitate other people, and in this case "We kiss" may not sound logical but we accept it because we have heard it and imnitated it all our lives. The reflexive is very common in Spanish, less common in Portuguese, and almost never used in English.