If you’re pounding one out that won’t really save you. He probably games with headphones and just doesn’t want to get jump scares by mom.
I always had a desk and a bed and I made a point to never have my back towards the door when I was at my desk for the above reason.
I used to almost exclusively listen to any kind of audio through headphones. I had a microphone near my desk configured so that it would pass through the vibration of footsteps directly to my headphones. I was rarely startled, no matter what sordid activity I was undertaking.
I swear the footsteps trigger a Pavlov response in me at this point. I can even tell who it is by the footsteps
Pavlov
As in you instantly lose an erection, because you’ve been conditioned to associate footfalls with a ruined orgasm?