Handjob Thoughts

I just watched a video a video of a guy giving a stranger a handjob under a bathroom stall. It really turned me on. I started fantasizing how much I'd enjoy stroking a stranger's cock under a bathroom stall. Even better if I could somehow suck his cock too. It made me think how every time I go in to a public bathroom and see another guy in there, I start thinking about my desire to stroke a guys cock. I wonder how I could make that happen? Then I worry if I insinuated something would he hit me or worse out me? How could I find out who would be interested? How would one know which guy would be receptive to having me, a stranger, stroke his cock and make him cum?