Guess Who Likes Threesomes

Recently been craving RPing as a couple interested in bringing in a third to their sex life. Admittedly, I would prefer one male and two females with me playing the male, but I also feel like that's a little selfish and I always prefer long RPs to short ones. So if you want we can kind of switch off. You play two ladies willing to share my character between them and I'll do the reverse of playing two male characters sharing your girl. Maybe we can have the four of them together for foursomes occasionally as well if the second guy and gal aren't just a new person picked up at the local bar every night.

I'm not feeling too particular on the setting, so we can do a sci fi, fantasy, modern, or whatever setting you like. I'm willing to do it as a fandom RP as well, but then we'd probably run into the problem of finding a setting with characters we're both familiar with, so I'd prefer our own original characters. 

Since I'd like this to be a long term RP as well, I'd like to also discuss a story to go along with it too. Nothing but sex always gets boring to me over time, I need something to be going on between sex scenes to keep interested, so even if it's something simple I'd like to discuss this with you once we agree upon a setting.

I hope this sounds fun to someone on here. I look forward to hearing from you.

EDIT:
So no one's really shown any interest in this, so I figured if perhaps I made some possible story ideas to go with it that maybe it'll seem more appealing. I'm not putting any limit on the characters we'll have, so we can have as little as three or as large a cast as Game of Thrones.

- Fantasy Setting: Speaking of GoT. We are a group of adventurers who have agreed to take on a high paying quest to go and find a mystical artifact for a powerful wizard's ritual. Along the way though, our characters get close. Really close. Let's just say any bandits that come across our campground are going to be surprised by how little time we actually spend sleeping within our tents.

- Modern/Cyberpunk Setting: Our characters are recently dating or married. However, as much as we love each other, we can't help but both think that there's something missing during our bedroom activities. Or more accurately, someone. And so our couple begins to dip their toes into the idea of polygamy.

- Superhero Setting: Our characters are the Avengers/Justice League of their world. The biggest difference between them and the heroes of the Marvel and DC Universes though is that the heroes of our world are much hornier. When they're not saving the world, our heroes can usually be found finding new parts of their head quarters to turn into a makeshift bed. In between sexcapades, I'll be sure to be coming up with interesting plot lines and fun villains for them to fight or we can work together and come up with tons of villains and invaders as we want. I'll admit, this is the version I'm most interested in.