It is quite alright, I am well aware that my sense of humor is weird and not everyone gets it. I sometimes think that it is because most people are looking for a punch line and for the most part with me there is not one.
I have been told that so often, but I don't care. I still keep trying, it amuses me even if no one else gets it. My normal response is " I guess you just had to be there" or " oh well" and let it go.