How to send heartbeat?

http://help.apple.com/watch/#/apdebd0bb96c

Go to friends view and select the friend and tap the digital touch icon. Lightly hold 2 fingers to the screen until the heart display and you feel the beat. This can take a while as it reads your heart rate (about 10-15 secs).

 

Here's a stupid question. When it sends your hearbeat does it beat according to how fast yours is going? Or does it just send a generic hearbeat? I really don't see the point of it, but I still think it's neat.

 

Sends the speed of your actual heartbeat.

"When you press two fingers on the screen, the built-in heart rate sensor records and sends your heartbeat. It’s a simple and intimate way to tell someone how you feel."