It all depends on whos there... If i'm alone with my parents i'll just be quiet and let them make the noises
so they don't catch me
But if im alone in the house, i have a rule of thumb, never put 2 pieces of bread on the mouse at the same time... if you know what i mean!
I play my guitar with my knob, so it can get noisy! Not your normal grunting, more of a mellow throbbing tune....