Another hot day drew to a close, and at 6pm I was cramming down into the Underground, my face as blank and neutral as everyone else's. So many people, all hot and tired, all hating the crush, just enduring it in order to get home. Even in my light vest top and wrap-around skirt I was damp with sweat, and I wondered how the men in their formal city suits could bear the heat of their jackets. The train came, and we shuffled on board, the tight press of bodies making everyone close off even more tightly into their own little internal worlds.
But I had a secret; although I looked no different to any other young woman there, apart perhaps from my rather less formal clothing, I was riding the tubes for fun. Before leaving the office I'd taken off my bra and knickers, and now just knowing that under my skirt and top I was nude made me prickle with furtive excitement. I kept my arms and big shoulder bag protectively in front of my generous bosom, and stood, like everyone else, squashed on every side by other bodies. My cunt juices were beginning to flow now, as I breathed in - carefully, so as not to attract attention - the smell of hot men, at this time of day only just disguised by their deodorant. My nipples swelled erect against the rough cloth of a man's jacket, as the jiggling of the train made my breasts bounce, unconfined under the thin fabric. Behind me, the press of another man against my bottom excited me further, especially when the train jerked and I was thrown off balance against him... a murmur of apology, I didn't look around, but maintained the strict 'I'm-not-here' protocol. One stop, some off, some on; I was going almost the full route so was well away from the door, wedged between two large City types.
As the train gathered speed again and started its regular gentle rocking, I froze, then gasped quietly... there was a hand on my bottom, coming from behind, a large male hand gently caressing the curve of my buttocks, one finger pressing up against my skirt, between my thighs. I clamped my buttocks together, but the hand didn't retreat. I dared not try to look around, but just stood there. After all, in this crowd, what man would dare do more than the most surreptitious fondling? I might as well enjoy it... and I relaxed against the hand, opening my thighs and shifting slightly so the material of my skirt was freed up and there was space for his fingers to move. My breathing became shallow and excited as the hand explored my buttocks, the crack between them, and then tried to follow around and under, between my legs. My skirt prevented that, but he could tell I wasn't wearing any knickers. Another jolt of the train and our relative positions changed, so that he was standing directly behind me, and I could feel through his trousers a most impressive hardness nudging at my bottom.