"It's like talking to a brick wall!"

Ever hear or even use this phrase when discussing matters with a person who is more difficult to talk to than a snowman is to melt in sub-zero temperatures? I've been guilty of this. "It's like talking to a brick wall!" However, I think I've changed my mind on the usage and meaning of this phrase, for whenever I'm in such a discussion with a person, I now think to myself, "If I were only speaking to a brick wall, I wouldn't receive such stupid responses." I may now post a personal ad that reads, "Seeking brick walls to talk to, especially regarding politics and religion."