I know I am late to this party, but wanted to share my story. Funny enough it sounds a lot like synthenix's experience.

I was about 15 or 16 one I first started to get to know/eventually date my first real girlfriend. By this age I already knew about my fetish but hadn't told a soul about it. She was a gymnast and cheerleader, so she was a skinny girl, but had nice curves on her (shapely legs, a booty, the whole 9) Over one year of dating her, we hadn't had sex yet, so it left us exploring each others minds and habits. This was nice, because it built a lot of trust between us as we shared more private stories and what not. A time came within that year when we were chillin in her basement and she yells at me from the bathroom, saying she had to show me her food baby (she's the type of girl who loves to eat) because she looked major preggers and thought it was funny. She was in jeans and a t-shirt and she hiked up her shirt so that the bottom of it layed across the middle of her belly button, and then began to push her belly out. She indeed looked pregnant, it was so cute. I had to stop myself from getting too excited but I told her I thought it was funny and that she looked adorable. As time went on, she became more comfortable around me with things, as we'd spoon on the couch I'd lay my hand on her belly and start slowly taping it or rubbing it a little. I can't really tell you when it came out, even for a while she believed I developed this fetish while dating her, stating to me that out of no where it became a thing that I'd "play" with her belly. Eventually I told her, that I had this fetish for as long as I could remember, but didn't know how to bring it up to her. By this point she knew me very well and thought it was very weird that I loved a food stuffed belly, but loved me enough to just go along with it. We dated for two more years after that, over the course of that time she really allowed me to explore this fetish to the max, we'd go on stuffing dates where she'd eat as much as she could fit and then proceed to let me play with her gut as soon as we got in the car. I'm not one for weight gain, it's just not my fetish. Mine is more so resembling a pregnant belly, so small arms and legs and rest of body, but a big protruding tight tummy. She never got huge, but she did end up gaining some weight from all the stuffings we did. We once went to three different restaurant in one night stuffing her belly to the point of poping, and she even gave in to going to one more place to eat a massive dessert even though she felt huge, just to see how excited I'd get. I always pushed her to fit more into her belly (she would say she was full after a normal size meal, but if I pushed her, she was a black hole) As I stated before, she loved food in general, she didn't really like the feeling of being completely stuffed but did it anyways, cause she knew I loved it. She allowed me to take pictures of how her distended mid section after meals, we even played around with weighing before and after meals to see how much she consumed. She even walked around in public with her food baby pushed out with nothing but a sports bra and shorts on (we just finished a run) Eventually it got to a point where she knew the power of her belly, if she ever wanted something from me, or hell even wanted to just be fun she'd talk about what if I ate all this food right here, or mess with my mind and say things like consuming a bunch of beer and balancing the bottles on her stomach. We ended up breaking up after 3 years of dating. Fast forward one year, and we ended up dating one last time for only a year before we called it quits again. Over the one year we were apart, I started experimenting with drugs (I was a straight edge kid before) and by the time we got back together I smoked weed on the regular. A day came when she wanted to try smoking....and it changed everything. Food tasted 100 times better to her, and she stuffed waaaaaayyyy more than before, as I'm sure all you pot smokers out there know. If you eat a shit ton and then smoke, it's like a reset. She could be stuffed to the brim and then get high, as soon as the munchies kicked in, it was back to shoveling food in. Though we played around with stuffing and smoking, she was actually in better shape now (slimmer, smaller belly) then when we first dated. She had falling in love with fitness, and was in the gym everyday, eating healthier foods, just killing it. I had a ton of respect for her, and knew she didn't want to get back into bellies and stuffing as much as she used to be. We stuffed her less frequently, and with less fattening foods. Instead we just eat a shit ton of veggies fruit and some portend, and of course some sort of dessert. I found out that after she would work out, if she did cardio, for whatever reason she would get big bellies. It had something to do with how she breathed while running. We called them air bellies, and if she wasn't really in the mood to eat a shit ton, we'd just go for a run together and then I'd play with her belly after. I should also state, that during this time I became addicted to the gym, and like I mentioned before I'm not one for fatty arms and legs on girls, I just liked the big belly look. For me, it became fun, pushing ourselves in the gym, seeing her butt grow with muscle and her legs become power houses. It also made eating more enjoyable for her, seeing as she was in the gym burning calories, the stuffings wouldn't stick to her, it would just be a nice food baby I could enjoy. We continued this well after we broke up the second time, by this time we were best friends and didn't care that we were ex's, we just wanted to be apart of each others life to some extent. Over the time we were just friends, she still allowed me to stuff her and play with her tummy, but it was a lot less. I gave more into pushing her and us to becoming beasts in the gym, and since the belly and stuffings were a lot less frequent, it made them more fun and excited when she allowed them to happen. Fast forward again a couple years, and we are still best friends, she is still rocking the whole fitness life, and has a killer ass body. She had asked me if I wanted to run a half marathon with her, I told her that if I did (this is the farthest I told her I'd ever run with her...I didn't like cardio then) I would want something in return, eventually we agreed that she would have to eat a whole box of donuts. After the run, which we finished without stopping in a little over 2 hours woo woo!! We got our donuts and she ate a total of 10 before she had to tap out, I asked to see her stomach, cause I mean come on, there's 10 donuts in there, she said no. I eventually convinced her, since I had bought a plane ticket and ticket for the race (all and all very expensive) and least I could do is see if for a quick second. Fast foward one more time, it's present day, we are like siblings now. We talk all the time of continuing to push ourselves in fitness and enjoying working out together when I'm back in our home town. She doesn't let me see her belly as much anymore, though we both still love to eat, so she still stuffs for me (she's the bestest of friends) but even just the other day, she sent me a snap of her enlarge belly after a meal, saying she was gonna act pregnant for April fools. She allows me to be me, and talk about this fetish when I want, she even allows me to pat/rub her normal belly, and we have a game that we have played for ages now where I use my finger and try to poke her in the belly button, when she is fully clothed and if I miss she guides my hand to the target. I guess the big take a way from this, if you don't want to read this crazy long thing, is that your SO is probably not gonna have the same fetish as you, and will hopefully let you indulge to some extent, whether that means, just being open to talk about it, or even if your lucky enough for them to stuff for you or stuff you! But it's important to balance what they want, she never liked feeling completely bloated and round, and I found a great passion for working out because of her.