Rotten Apple

Tonight my wife found a slightly rotten apple under the kitchen sink. This apple was in the sort mushy stage. She then cut it open so the girls could see what it looked like. After this she smelled it. She got this amazing look on her face, a very contorted look. Then she wondered if I wanted to smell it. To which I responded, Are you kidding me?!? She called this science but I am not sure what they learned. I guess that things which are mushy and rotting stink...