Here's a movie suggestion based on a real life observation I had recently. Not sure if it’s even feasible, but thought I would share it with you. This is what happened….
The setting is a concert venue in London followed by a trip on the London Underground (hence the need to adapt unless you fancy a holiday!!)
I happened to be viewing the queue for the ladies toilet when the concert finished (it was a big venue with loads of people exiting at the same time), being a bit of an opportunist! It was getting quite long when two nice slim girls each wearing tight jean joined the end. It was obvious they needed to pee badly by their body language, and must have been bursting in their seats during the concert, which is a turn on by itself!
So I conveniently got quite close to them pretending to speak on the phone, and could hear them discussing how long it would take until they were able to go. One of them then suggested that they could be home before they would finish waiting in the queue, and asked if her friend could wait whilst travelling home instead of just standing about in the queue. Her friend wasn't sure, and said she would prefer to stay in the queue, but then reluctantly agreed, and they both left to make their way home, still clearly desperate to pee.
Not sure if you are aware, but there are no toilets on the London Underground (at least not at the station in question, and definitely not on the trains), and they were travelling home on it!
I followed them along with the crowd, getting all bunched together, which as a bonus meant I was getting pressed up against those two girls. With a bit of maneuvering I managed to get in from of them, and by 'chance' found my hand pressing on one of the girls bladders, and it did feel full!! They weren't aware I did that on purpose due to the crowding, and even added a little extra pressure for good measure. But that’s an aside!
It took ages to reach the station platform, and I reckon they would have peed by now if they had stayed in the queue at the concert venue. Anyway, having reached the platform, there was quite a long wait for the train, and I think those two girls were regretting the decision not to stay in the venue until they could relieve themselves. I really enjoyed watching as they struggled to hold on whilst waiting for the train. When the train did come, they had to stand, and I could clearly see lots of bum clenching and leg crossing going on.
In the end, they did both get off the train without any wet patches, and I always wonder if they made it home in time!
It would be great if you can somehow get a movie out of that?