Is it normal that i hide in my room holding in my poop?

I have always held in my poop for days, even over a week, until it gets huge, hard and thick. I like to sit in my room, farting softly around the massive blockage, and letting the tip poke in and out. I do this alone in my room and hide out for days, feeling it grow. The farts get worse and worse and fill the room, but I still stuff my face and grow the log. I'll have my mom leave food outside the door then waddle to get it after she leaves just so the stinkiness isn't exposed. Anyone else do this?