Hey guys. Long time lurker here with what I think is a tough one. While this may be a little specific to my situation, I figured there may be others in open relationships that can benefit from this discussion, hence why I posted here instead of /r/askseddit.

Anywho... I'm fortunate enough to be in a very unique situation that many guys would give their left nut to be in. However, this is the internet, and a lot of you will probably think I'm full of shit. That's fine, I get it. I don't care if you believe my story or not. Those of you that give me the benefit of the doubt and help out with genuine advice: thank you so much from an awkward fat guy w/ little game who may be in over his head. If you don't have any advice but want to know more about my situation and how it came to be, feel free to ask me whatever you want. I'm an open book.

Enough of that. Here's the scoop. Not only am I not very good looking and overweight (but currently working on getting in better shape- 70lbs lost, ~30 more to go!), and NOT ONLY have I managed to lock down a gorgeous curvy blonde HB9 (in my eyes, of course. Maybe HB7/8 to the average guy) who is the love of my life, future wife, and satisfies me in every way possible, but this woman actually gets off watching me bang other women! Dream come true right? I get mind blowing sex, and a loving life partner, but if I ever find myself wanting to have sex with someone else, she actively encourages it!

Here's the kicker. I'm no PUA. I'm kind of an introvert, and while I have just enough game to get by as a single person, my techniques haven't quite carried over to pulling women as part of a couple. You see, while I'm not great at opening (working on it), I'm great at chat & banter, and can flirt and lightly tease, and am good at making people feel comfortable. However as a single person, I always close indirectly, and can't seem to figure out how to be overtly sexual up front without sounding like a creep. I typically invite her over to watch a movie or something, then initiate and escalate kino, move in for a kiss, and close the deal. It's all unspoken & subtle.

However, this doesn't seem to work in my situation, having a girlfriend, who primarily wants to watch, but sometimes join in. I've had a few successes on apps like tinder & OKC, but they're few & far between. We're talking 4 successes in about 2yrs. I'm sure you all know, many women want casual sex, but they don't want to openly admit to it. Hence why having her over for nearly anything other than sex & escalating works so well. Women want to be having an innocent, fun time, and have 'one thing lead to another'. But the sort of situation I'm in - trying to find chicks for my fiancée to watch me bang - makes it extremely difficult to 'ease into it' and let 'one thing lead to another'. Most women are not comfortable with adding a SO into the mix. I feel like I need to be up front about what I'm after, and let them weed themselves out. However as I mentioned above, I'm kinda in over my head and not having much luck. I feel like this situation dictates our conversations & interactions need to be sexual, and I'm no good at all at turning the conversation sexual, or flirting in a sexual way, or indicating attraction/desire.

My question for you experts is this. How would you go about this? What would you do? I'm currently focusing on tinder & okc, have my best pics up, and state clearly in my profile that I'm in a non-monogamous relationship and looking for a fwb. Would you try to discuss the SO situation & what we're after up front? Or would you assume she read the profile, get her to hang out doing something fun, then try to get her to come back home without ever bringing up what the situation is to not scare her off? Should I plan for all 3 of us to meet/hang out, or go solo, tell her the situation & then introduce them if all goes well? How can I frame our interactions as solely physical with no chance of a romantic relationship? How can I be forward & sexual, without being creepy, AND be open about being in a relationship? How can I flirt in a sexual manner & indicate attraction/desire without being a creep? Any other tips & pointers for me?

Thanks in advance, and again if you have any questions about my situation or how it came to be, ask away.

tl;dr: how can an overweight, non Calvin Klein model be forward to create casual fwb relationships while in an open relationship?