I remember masturbating nearly every day when I was a teenager. It was like a contest sometimes. I'd run home after college, run up to my room, and try to make myself cum before my sisters came home. As I got older, I started being more adventurous. I'd eave the bedroom door open and keep myself on the edge of cumming until I'd hear the front door open and then I'd let myself have a mind blowing climax. I knew I'd have ab...