Or, to speak from personal experience, before I was even aware of Heese and Schwimmer's thoughts on the matter, I was chatting with another astrologer about my birth chart. He noticed that my Mars was in Cancer, but didn't make much of it and pretty quickly moved on to focus on all the Capricorn activity I've got going on. It was only when I mentioned that my partner's sun sign is Cancer that he made a big deal out of my Mars placement. "Oh, that makes perfect sense, then," he told me. "That's what drew you to him in the first place."