For anyone else who missed out.

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So like most TIFU's this didn't today but I'm new to this subreddit and thought you'd get a kick outta reading about my misfortunes. Little backstory. I was 20 at the time and my then girlfriend - we'll call her Alex, for the sake of the story - was turning 18. She was a little on the fat chubby side being only 5' 6" and weighing 200lbs+. Alex was always sensitive about her weight (like most women, I guess) but she was a nice person and being the good boyfriend I am, I never said anything about her size for fear of upsetting her. At this point we'd been together for like 6 months and I was invited to go on a two-week vacation for Spain with Alex and her family to celebrate Alex's birthday. I had to pay my own way and didn't really want to intrude so wasn't thrilled about going but she was kind of a brat and had a tantrum about it, telling her parents she'd rather not go if I can't go, so I had no real choice but to go. So anyway, we arrived at the resort. Alex and I had our own apartment while her parents and 16-year-old brother shared another one down the corridor from us. I was all like "woohoo! private apartment for sexyfuntimes" but was sadly disappointed to be told that shark week had begun and her lady business was closed for maintenance. So the first week was a bit of a write off. On the night of her birthday she'd finally got off that blue-ball-causing red cycle and we were all down in the resort bar drinking sangria and generally chit chatting and having a good time. It was getting late so her parents left while her brother stayed and we all continued to get hammered. An hour or two later her brother left and we were finally alone. We're both pretty drunk by this point, when she gives me a look that say "my eyes might be red right now but my vagina isn't anymore". So we head up to our room. As you can imagine, after over a week of waiting somewhat patiently, we make it to the room. Barely containing ourselves we burst through the door in a tornado of drunken sexual frustration and excitement, leaving a trail of clothes behind us. Too caught up in the moment to make it to the bedroom, we fall onto the sofa and begin to get physical. So we're both naked and going at it in the conventional Missionary position, her legs resting on my shoulders. I'm looking down and watching everything jiggling and slapping together, she's looking up at me all red-faced and concentrating. Then she says the words most Beta's dread to hear: Talk dirty to me! My face drops and I start thinking oh no, oh no, what do I say? but this bout of sexytime has been a long time coming and I wasn't about to let the moment slip away so I start saying mild stuff like: yeah, you like that? or does that feel good?. Thinking I'm doing a good job of it and keeping the magic going enough so that she's happy with what I'm saying. She's really getting into it and as a result, I'm getting into it. Then she asks for more! And this, ladies and gentlemen, is where I truly FU. In the heat of the moment (drunk or sober, I don't even know why I'd think this was a good idea) I reach down between her legs and grab a handful of her gut and say, verbatim: "Do you like it when I grab your flab you fat whore?" Stunned silence. She practically kicks me off of her, claiming she's drunk and not feeling well so we stop. I go onto the balcony for a smoke and then to the bathroom and get ready for bed. When I do finally join her in bed, I'm greeted by the iciest of cold shoulders imaginable. Suffice to say the rest of the vacation was a miserable, sexless affair. She eventually forgot about it but I don't think she fully forgave me for it. Alex and I stayed together for another 2 years after that before separating, but that's another FU story for another time. TL;DR: Called my girlfriend something horrible during sexytime and never got to finish.