Offer an invitation.

In the last minute before the next stop, you surprise everyone. You whip out your monster cock right there out on the track. You have all the women's attention now and your sister clutches your arm excitedly. You reach down and grab it a foot from the base holding it up showing how long it was, and even a foot from the base there was still so much more that just flopped free, far more.

You look at all the women their eyes glued on you and say, "Me and my sister here are gonna get off at the next stop and get a room at the holiday inn there. Anyone who wants to join us feel free to follow." With that you slip your monster cock back into your sweat pants one foot at a time, every woman even your sister is stunned silent.

Yet when the train stops and the doors open all of the women crowd around you as you lead them, not a single one could resist your offer. You smile as you walk out of the station to the hotel across the street, and get yourself a room for the day.