In bed should be cool - unless you are right next to your parents and make a whole lot of noise! lol. Shower should be cool too. Unless your parents are weird, I can't imagine they are crouched outside your door, or the bathroom door, listening for the slightest sign of a wank, lol. I used to use the kitchen sometimes - my mum NEVER went in there!
Doing it bed quietly. I have two sisters and we lived together in one room until 15. I've been doing it every night and they never noticed (hope). And try to do it while you taje shower/bath. As I remember in bath I did it and like to play, foam hide it Is theres empty flat when you arrive home after school? If so, you do it where you want as I did.
This is a great thread, and I love the way so many of you are going along with it as if it was serious. But you're all missing the point. Cool Joe's problem is that if his parents find out about him masturbating, they will get mad about him having a better sex life than them.
My mom told me what I was doing was wrong when I was very little. I had my hans on my clit and was asking her why does it feel like this...etc. She told me what I was doing was very bad and I didn't understand. Later, I used to sit in the chair while my parents were on the couch watching TV and get off under my blanket. Sometimes they noticed I wasn't watching it anymore and would say "you don't like the movie". LOL My parents are the prude sin type but its not impossible. I think they always knew what I was doing and were afraid of what they would find out....worked to my advantage. LOL