They are fixated on your crotch

The two girls continue to talk to each each other as if you were not there.

 No wonder really, as they were not used to treating men with much dignity and respect.

At first you feel flattered by their long close-up admiration of your body,

but after a while you start wanting them to look at your face and listen to you.

 You try a variety of conversation openers,

but all are completely ignored by the two ladies, as if you were on mute.

It was not long before their fixation on your crotch led to a crotch grab.

All of a sudden, you were completely at their mercy. They had you by the balls and were squeezing you balls, harder and harder. 

 When you tried to brush her away, the other girl grabbed your arms in mid air and had both your arms tied behind your back.

 The situation had now escalated to a level where the girls felt they had to assert their superiority over you, to quell your resistance, and to make an example of you for later ...

 so they started to kick you in the balls ... WHAM! RIGHT IN THE BALLS!

Then again Whoom! right in the nuts.   ... and once more WHAM! RIGHT IN THE BALLS! Ow!  Then it was over.

Or was it?

The girls switched positions, allowing the other one to get a good aim at your balls, while the first one wrapped a leg around your ankle, forcing your legs to stay wide open and ready for more kicks ....