While in college, my girlfriend at the time would make challenges with others from time to time. One particular evening we were home with some friends and their girlfriends, and the conversation led to different types of kink, and the topic of DP came up.
Now the guys were all heads-up and attentive, and the girls were kind of keeping a low profile. My GF spoke up and said it was massively fun. Not only did she think double was fun, but that she thought that "I" could handle a triple. I raised an eyebrow. She laughed, then said, "If you girls don't mind, why not try it here? The boys could use me." (Both eyebrows raised.) The girls laughed nervously and the boys stared at each other and I just rolled my eyes.
I said, "Okay. But I get to pick what goes where."
Well, that was all it took. The guys dropped their pants. The girlfriends didn't say anything. We all had been friends for some time, and I knew their partners so I wasn't nervous about STDs. The guy with the thickest dick was on his back. The guy with the skinniest dick got my anus, and the third I sucked. I mounted the guy on his back, and then guided skinny up my rump, and then sucked the third guy. Concentration on moving just right was the challenge for me. And just like clockwork, the guy up my ass shot his load after a couple of pumps and the guy in my mouth came next. The guy on his back just had too much fun, but finally he finished.
No big deal, but I sure loved doing it. I would never admit it to my then girlfriend, but it was a lot of fun. I had all three under my control. Even though I was approached by the boys a couple of times, sans their girlfriends, I declined their offers. I love to see sad, pouty faces.