On the 2nd day of cumming...enjoy a Silent Night!
Make your room as quiet as possible! Now lube up (if you want) and masturbate, but be sure not to make a sound (not even as loud as a mouse)! No heavy breathing, no lubey fapping noises or ball-slapping sounds...it's got to stay silent, even if that means a frustratingly slow fapping session! If you're a noisy cummer, you may even need to tape your mouth shut or use a ball-gag!
Enjoy your orgasm, but be sure to not make ANY noise until after you're done cumming, or you're going to repeat this tomorrow until you get it right!