How was the most classic "business trip shared room" trope formed?

Classic Business Trip Shared Room Mode Origin: Exhausted Salaryman and Sexy Female Colleague Unwittingly Share a Room, Alcohol Takes Hold in Tight Space, Eyes Lock and Sparks Fly. She Moans Softly, Shedding Her OL Uniform, Her Perky Big Tits Swaying Temptingly; He Roughly Tears Open Her Black Stockings on Beautiful Legs, Thrusting Straight into Her Dripping Wet Pussy. Doggy-Style Pounding with Echoing Slaps, Cowgirl Hip-Grinding Frenzy, Creampie Orgasm with Squirting and Convulsions, Endless Moans, Completely Reduced to a Cum Dump. The Cuckold Husband Eavesdropping Next Door Explodes with Rage!