Yes but I prefer to be included more actively.
Last summer a cute young couple set up in the campsite next to mine at a nude resort. They were very friendly and we chatted quite a bit. She danced with me at the karaoke night, which was a lot of fun. As we were all walking back to the tent camping area afterward, she said she couldn't wait to get back and get fucked by her boyfriend. And then said it was a shame I was traveling alone. Then she asked if I'd like to watch them. Of course I said yes. 😊They set out a blanket in front of their tent and went at it. I sat on the picnic table bench next to them and watched and stroked. It was very hot and I thoroughly enjoyed it.