Roomate and I have the rooms on the top floor, literally just a staircase up to a landing with my door on the right his on the left.
We were both doing it with our respective girlfriends, it was funny enough that both parties could CLEARLY hear the other, when our 3rd roommate, drunk off his ass, comes home and storms up the stairs yelling that he wants to hangout.
He reached the top step while yelling our names, then suddenly went completely silent, probably because he clued in to the sex noises coming from both rooms.
Since he was drunk, he decides the right action at this point is to sit down on the landing, pout, and start playing porn off his phone at max volume.
We tried to keep going, but after a minute I was cracking up so hard I had to stop. I got up, but a bathrobe on and whipped open my door….. Right as my other roommate did the same thing. We both looked at each other, looked at roomie #3 who had at this point literally fallen asleep leaning on the wall with his phone in hand still playing porn, and just burst out laughing. We both walked him down to his bedroom and put him to bed before going back upstairs, but needless to say the mood was ruined at that point.
All had a great laugh about it the next morning, drunk roommate had 0 recollection of the whole thing and was totally mortified when we told him what he did.