Awe!!! I've never had a mouse but have had many rats. Its amazing how intelligent and loving these little rodents can be. I never understood those that think they are gross... they are so damn cute!!! Enjoy yours. Don't worry about it, unfortunitly they do have short livespans, but if you know that you can be comfortable with the fact that you can give it a great life, even if it isn't a super long one!!!