Go backwards.

You walk backwards to the last car in this train wondering if there are any stragglers in the back. From you late night escapades you have found that the last car of the train is usually were there will be action, if anything is going on. You open the doors and see two people all the way in the back sitting next to each other. They are side by side and very close to each other. You start to walk closer to them and finally see that it is two women that must have finally finished their night at the local clubs.

The one on the right is very drunk, but not as drunk as the one on the left who is snoring away. Both of them look like college students. Both slim and dressed in short skirts and tight tops, normal barhopping wear. As you get closer you notice that the one on the right looks very young and has jet black hair cut in an extremely cute bob cut. The snoring one is a little hefter, but not fat, just shaplier. She has blond hair that comes down to her shoulders and about an inch of brown roots showing.

As you get closer you notice that the young girl with the black hair is doing something to the blond. You can't believe it, but her left hand seems to be very far up the blond skirt. You notice that the black haired girl also has her other hand slipped under the waist band of her skirt. You suspect from the motion that she is slowly stroking her pussy.

Do you stay back and enjoy the show, or walk up to the girls?