I'm a 5'8 guy. I hit the gym once or twice a week and do cardio whenever the weather is nice. My girlfriend is the same height as me but rarely goes outside so she is on the pale side, with light brown hair and an average body type. She does smoke and I've tried to get her to stop but I know it helps her with stress. I'm a fairly vanilla guy but she is into BDSM so I'm down to try new things if it pleases her but up until this point, we have only tried light bondage and blindfolds. We have however talked about many BDSM subjects in detail to see where we are at with each other. Time and time again, she has insisted that she is a switch (which means someone who likes to play both roles) but for as long as we have been together and tried BDSM, she has always been submissive. I hold the firm belief that I won't give her power unless she takes it for herself but have made it plenty clear that I have very open-minded and she can try anything she wants, knowing we have the safe word colour system if we need to stop. But after 6 months of us being together, she still hasn't tried to take control despite my encouragement.
One day, we were out on a date in town. Nothing too fancy, just like a casual outing in an old-fashioned coffee shop just chilling and talking. We eventually got into a debate about whether she is always submissive, I argued that she likes the idea to be dominant but lacks the confidence to do it. One thing led to another and we made a bet that we both get to make a request of each other and we have to fulfil it within reason. So, I instantly knew I wanted to tease her. I called the waitress over to order something and she noted it down and then went to ask you. As you went to talk to her I told her to shut up, that being my request, you did and just nodded so I ordered something for her. Telling her to shut up had become an inside joke as we both knew I didn't mean it so it was a struggle not to laugh at the waitress's face who was indeed, not in on the joke.
We left the coffee shop and started wandering the high street. She was quieter than usual and I have a feeling she was planning revenge which began to materialise as we stopped at a Victoria's secret and she gave me a wicked smile like that of a succubus about to prey on their victim. The shop was mostly empty and there was a lady that was there to assist us. Basically, she said that her request was "to get my real opinion on underwear" which seemed like a rather tame request as if I wouldn't have taken part. So we go around the shop and she picked up a couple of things before heading over to the changing rooms. We were in a bigger one that has a door and not just a curtain and I sat down on this bench that wasn't particularly comfortable, probably just for putting on shoes. She told me that she felt shy and awkward changing in front of me so she went into her bag and took out a blindfold. But she still wasn't satisfied that I wouldn't peak so she also brought out a rope and tied my hands to this metal bar above the bench. A part of me wanted to question why she had those things in her bag but my second head was using up all my brain power. After she had changed, she took my blindfold off and I started telling her how beautiful she was, to me she was perfect and I still get blown away every time like it's my first time seeing her but it wasn't words you wanted, but rather to know my real opinion. Still tied, she climbed on top of me and started grinding. I was rock solid pretty quickly but she still tried on the different sets of underwear. When she was satisfied, she pulled down my pants to reveal my dick. Giving it a little kiss and then returning to an evil grin, she had more of a revenge planned. When I went to protest, she pulled back down the blindfold and shoved her old dirty underwear in my mouth. She then just left me in the changing room to go talk with the assistant lady.
After a couple of minutes of silence and tasting her in my mouth, I heard the door open and a loud sigh. I started to panic a little as I thought it was a stranger until she started laughing. I felt a little humiliated and embarrassed, but a part of me felt it was fair for my earlier teasing. But she wasn't done. She went into her bag and started talking about how she got me "a toy" and I was a little scared again as to what it could be. I felt one hand on my dick to hold in still as you slid a rubber ring around it. It was a cock ring that vibrates when synced to an app. She switched it on and quickly took off her clothes to get on top of me again. She was grinding, somewhat in an exaggerated manner, trying to tease me as much as she could but got a little more than she bargained for as she had basically turned me into a human vibrator so it was really turning her on too. We didn't have protection or lube so we didn't want to take it too far but that didn't stop her from rubbing against me and slapping me in the face with tits. But the ecstasy was short-lived as the assistant came to ask if we were okay so we had to get out soon.
She put her own clothes back on then helped me with mine and tidied us up. She put the blindfold away and started to untie me. Then as I went to stand up and finally take her underwear out of my mouth, she swung the changing room door open and the assistant was standing right there looking at us so I pursed my lips. She thanked them for their time and whatnot as I just smiled at her. We went to the front desk to pay and she joked about how I'm just her obedient mute, there to serve her. We left and walked around a bit before getting to the town square which had a lot of people.