Guy in the ladies toilet

So I was out with friends last night at a few bars, and I went to use the ladies room. <br>There's 3 cubicles and 3-4 sinks. As I walk in I notice a guy sitting on the floor on the opposite side of the sinks neck deep in his phone. I go to the first cubicle and he looks up as I walk in, I'm sure he saw me. I shut the door and do my thing, after a few mins I hear the door shut, I assume that it was either the bathroom door or another girl walking in, so I open the cubicle door and walk out and he's sitting right on the floor again. I say to him 'I think you're in the wrong bathroom mate' he looks at me and looks up at the sign on the main door that says 'ladies', he starts to get up and walks out, as he does I see him pull down the pants of the guy standing next to him (I didn't notice him standing there till he got up) and I hear a man groaning in ecstasy. I don't know what to do, I didn't wanna stick around to see how that was gonna go, so I just walked out. I found my friends and told them what happened and asked if the guys toilet was fine and they said it was, I don't feel right telling them because it's not my story to tell. I really hope I didn't just mess up a moment for them because of my initial thought process.