I don't know why I had a hard-on. I just did. I was eighteen and I spent half my waking hours with a stiff cock. I don't know why I walked downstairs that morning in just my open, white silk shirt, either. I knew my mom was home, but didn't think we would run into eachother as I hurried to the refrigerator. As I turned the corner into the kitchen, she was right there. My cock's face actually touched the belt to her dress....