If you make a joke and no one hears it, is it still funny?

 When I'm by myself and I see something I need to make a joke about, I feel bad that no one else is getting the joy of my humor in that moment. I have to say it out loud too. Today, I got out of my car in the garage and saw a bunch of lamps in the car beside me, and I said "that looks shady." Then I was watching Vera Season 11 and thinking OMG she doesn't emote at all, just rattles off the lines. Then they picked up what may have been the murder weapon because it fit the criteria based on the post mortem of the victim's condition - "blunt, heavy and wooden." And I said, "like your line delivery. "