In the music video for 'Another Chance' by Roger Sanchez, a girl stands in the street with her (very large) heart out 'on her sleeve' as it were, and everybody walks past her, ignoring her or hassling her and her heart gets smaller and smaller and it's all very metaphorical.
But the point is this. Why? LOOK at that girl. I would stop and talk to her, and I'm not known for my ability to strike up conversations with strange girls. But she has a giant heart! So perfect lines to start with are; "What's that all about?" "What are you doing?" or just "You seem to have an enormous plastic heart there". Let alone the opportunities for corniness, i.e "Careful with that, you don't want to break it", or perhaps "We aorta go and get some coffee".
Conclusion: people in music videos are stupid.