This the most useful advice about getting a man's heart I've ever seen. I imagine Tony Stark thinks these are brilliant PR. And he's right.
I never understood that joke. The best way to the heart must surely be to avoid the sternum? From WP: "... a long flat bony plate [...] helps to protect the lungs, heart and major blood vessels from physical trauma." Obviously one would want to avoid going through the sternum. Also, almost half of the heart is actually not behind the sternum and so pretty accessible if one can navigate between the ribs.