Stuart leaned up against a door as the train rattled across the snow-muffled town. He was in the throes of a horny hangover and unable to stem a steady procession of erotic images across his mind's eye.
He looked across at the half dozen passengers in the carriage. Two were attractive -- a middle aged woman, blonde with delicate features, sharp cheekbones, green eyes and a dark young man, athletic and serious-looking.
Stuart decided that what he would most like to do would be to go over and sit between them placing one hand on each of their thighs. Their murmurs of approval would embolden him. The right hand would lift the skirt and her thighs would part themselves as it slipped into the bristling warmth of her panties. The left would undo the athlete's zip and gently free his engorged cock for all to see.
He imagined the two of them breathing heavily on either side of him. Other passengers transfixed as the eyes of his new friends widened at the brink of orgasm.
'Not socially acceptable, probably cause alarm' thought Stuart ruefully. Blissful way to travel though.