Years ago I took the train home with my wife. It was an open-plan passenger wagon seating about 90+ people (I guess). I remember my wife starting to rub my dick through my jeans. Since nobody noticed and we did not draw obvious attention, I started to enjoy the tease. After some time I whispered into her ear that I was going to cum.... So I opened my jeans to allow her access to my dick.

What a moment of desire.... what a release...

How to clean it up? I did my best to somehow get to the train toilet before my jeans were showing the stain.... I will never forget that train ride.... By the way, I only thought about any security cameras in the wagon as I am writing this now.... who knows maybe we were recorded!