Its probably not a good thing, but I cannot help sneaking upstairs when I get five mins to listen to the baby. It is such a reassuring sound. With my DS I didn't try to find it til 14 weeks as i didn't believe I would find it but we have been able to hear it since 8 weeks this time. My DS is also obsessed with listening to his baby (which he thinks is inside his belly button). Any other addicts out there?