Offer a hand!

You couldn't believe this, it was right here in front of you, it was so dirty, and yet it felt so.. sexy! The sensation of being beaten off to in public, the heat radiating off of him, it was intoxicating.

You're not one that usually finds herself living every moment like its your last, but anxiousness gave way to further curiosity. You bring a hand up, and cup the underside of the member with a soft palm. No words are exchanged, yet he understands and pulls his hand back, allowing you to take over.

Onlookers pull their phones out and begin recording, some for evidence to show to the police, some purely for the thrill of that film.

You begin stroking slowly, a firm lewd rhythm. Your fingers are coated quickly in a mix of sweat and thin, slimey precum. The sound of fapping fills the otherwise silent train.

He grunts louder, you think he might be close.