Here is a secret that husbands who want their wives to do something sexually thrilling, such as be fucked by another man or flash strange men, the regular strategies of negotiating to not apply. In normal business negotiations, you start with a high offer, so you can be talked down to a reasonable offer; with sexual negotiating with your wife (or any other woman), you must start low, super low, so that you can be talked into something higher. For example, you have gotten so horny after reading all the stories at wifewantstoplay that you tell your faithful, conservative wife of twenty years that you want her to be gangbanged by ten strange men while live broadcasting it on the web. Good luck and I hope you find a nice place to live—by yourself.
Say that you only want to show off your wife's fine figure instead, preferably naked, but you will happily take what you can get. You tell her that you would like to see her wearing a cotton sundress, the kind she used to wear when you first met. You stress that it needn't be short or too revealing, just attractive—in fact, you will happily buy her such a dress with your money. At the store, let her talk you into something shorter and more revealing. How do you do that? When she tries on a shorter dress, you utter a "Wow, you look great; your legs look especially nice, but don't you think it's a bit too sexy." Gentle resistance from you will prompt greater boldness from her.
Here is an example of how my candaulism urge and my first wife's exhibitionism ratcheted up. My wife and I wanted her to flash a male friend of mine (actually, he was just an acquaintance) when he came to visit me later that day to borrow a tool of mine. We brainstormed several ideas on how she could be in some state of undress when he entered our house, none to our liking. I then recommended that she could be sunbathing in the backyard in her bikini, her top unstrapped, lying on her belly, while she read a book; he and I would go out so that I could ask her if she had seen where I had left the owner's manual for the tool; she would pull her torso up, revealing a good slice of side-boob to him, as she told me where it was. She liked the idea but thought it somewhat mild. I argued that she had never met him before, so mild was better. She counter offered that she could be topless and on her back when we visited her. I pretended to be against it and suggested that we go into the backyard and experiment with her idea.
She put on her bikini bottom and collected a picnic blanket and a book. She lay on her back, while I walked up to her. She looked great, but I asked if her natural response would be to cover her breasts with an arm or the book, so wouldn't it seem a little odd that she didn't? She saw my point and, then, countered that if she was completely naked, she couldn't cover everything. She removed her bottom. I walked up, she pretended to be startled and placed one hand over her pubic hair, while the other hand held the book that she used to try to cover her naked breasts; unsuccessfully. More experimentation. She was getting bolder and bolder. She loved the idea of lying on her back naked with her knees up and her thighs parted enough for him to see her exposed pussy and anus. I balked at the idea, stating that it was a bit too scandalous, arguing that she could leave her knees up, but her legs pressed together, which would still provide some pussy exposure. It didn't. She tried placing one foot on top of her bent knee. Bingo. Lovely pussy view, but still seemingly modest and natural.
As we head back into our house, I lamented that he would not get a good view of her fine naked ass. She wanted to see if she couldn't do that as well. We went back to the blanket and she got into the position, and she, then, twisted to place the book on the blanket, with her ass facing me. I told her the truth, which was that I only caught a small glimpse of her ass cheeks. The solution was found in her going into the house with him and me, so he could see her ass wiggle as she walked ahead of us naked. The new problem was how to get him to follow us and not lead the way. Her workaround was to move the blanket to the side of our house, where a slider door in our bedroom opened out to the yard. Her plan was to get up and when we walked away, she would summon us to the open slider door. We would catch up with her, with him ahead of me, and he would walk behind her through our house until she found the owner's manual. He would get to see her breasts, her pussy, and her ass.
Two hours later, he arrived and she went out the slider door. I searched for the owner's manual unsuccessfully. I told him that remembered seeing her doing something with it. Off we went to see her. Her one-foot-on-the-knee position worked perfectly. (We had added her filling her ears with earbuds, so she could not hear us approaching.) He was obviously taken aback at seeing her nakedness, but I acted as if nothing out of the ordinary was going on. She and I talked for a long time before she remembered where it was. She got up and put on a short T-shirt. He and I walked away before she called us to the slider door. I made sure he was ahead of me. She happily marched through the house, with his gaze glued to her barely covered ass. Eventually, he became a good friend, and he often approvingly mentioned that time in the backyard. I told that next time she was sunbathing nude, I would call him. Sadly, it was late winter, so it was months before he got that call.