So my father just told me this from his chat in Wechat.
There was a stingy, cheap guy. He had some cold medicine. One day, he got a cold. He took a bath in cold water, and the other people were like, "Why don't you use your medicine? What the heck are you even doing?" And he replied, "I didn't want to use the cold medicine because it's almost expired, so I'm bathing in cold water."
Now that I read it and think about it, it's not that funny. :/