I have a habit that, I know, annoys my friends and family. I, generally, do not listen to my voice messages on my cell phone.  I will, almost always, call them back but, when asked about the message they left, I have to admit that I did not spend the time to listen to it.

Conversely, if I call someone on their cell phone, I generally will not leave a message.  So, if you call me on my cell phone, I will definitely call you back. Just do not expect me to listen to the message you left me. Would you?