You hear a knock at the door

As you lie there, you think about the wasted opportunity and the desire to suck a cock, which has grown bigger now that you're fully dressed. Thinking about cock made your own cock hard, but you fight off the desire to climax yourself as the desire to suck would be gone aswell.

Then a knock at the door brings you back into reality. You get off the bed. Is that Tom coming back, you think. You look through the peephole and only see an older man waiting for someone to open the door. You panic slightly, because the room is reserved to a man and not a woman, but there is nothing you can do and in a dark corner of your mind, it turns you on.