It sounds ridiculous, but you actually aren't far off... as a symbol for romantic love, people can't agree on when or why it started being used, but various theories include it it representing genitalia ( http://tinyurl.com/d8uuk - scroll to "as an icon" section!)
Thinking with your dick and thinking with your heart are the same thing with different words; so yes, I agree. Thinking with your brain is a different story.
I've seen real hearts. Real beating hearts and real but very dead hearts. I have never once winced or felt my balls retract while seeing any of these being cut up. I therefore conclude that this is a lie.
For anyone who said "No Way", he meant the generic heart shape, the one that looks like two raindrops stuck together. I hope that cleared things up a little.
Why is this negative... That's fucking hilarious.