I live near a walking trail that is a guy cruising place. I didn't know that the first time I went. I saw two men having oral sex. I acted like I didn't see them but looked back and watched for a few minutes. Is it okay to watch in a situation like that?
If someone or more are having sex in public it's open game to watch and even participate if asked. I was standing on the hotel balcony quite a few stories up. The view of the skyline was nice. Then I looked down at a building below from where I was. There on a terrace was a couple totally engaged in intercourse doggie. His pants were below his ass and her dress pushed over her waist. I could barely make out her tits that had popped out from the top since all I could see was her back. He must have cum as he stiffened and held still for a moment. Then he stands back and pulls up his pants as she straightens her dress and puts her tits away still with her back to me. They then disappear into the building.
I used to travel a bit with work so found myself alone in hotels often, so checking on the nieghbours windows was often a pass time. I did watch naked people and folks having sex from time to time. I also watched a couple on a nude beach practice tantra sex 10 -15 feet in front of me. So I started slow stroking along to their rhythm. The woman was straddling his lap riding his cock and watching me over his shoulder. That was pretty intense eye contact. Loved it.
Jimmy Buffet was sitting in the Atlanta Marriott hotel bar watching a couple interact. No, the weren't fucking in the bar but the chemistry between them was enough that he knew they would soon be in one of their rooms going at it. Thus spawned the song he wrote "Why Don't We Get Drunk". Given that I'll bet there been plenty of observations of people meeting in the bar and fucking in the parking lot before going their separate ways.