I have wrote about this here a few years ago regarding my exgf. My exgf used to be very adventurous sexually. This would rise mainly from dares and even her trying to push her own boundaries. One such example of this came from one time in a night club she was wearing a very short sexy dress. She was tiny (4' 10" tall and just 40 kg in weight) but firm with a wicked mind. Just for a dare I whispered to her "next time you go to the toilet, bring me back you panties". I could see her milling this over in her sexy mind. A minute later she passed me her drink and toddled off. To get to the toilets she had to walk up some steep stairs with groups of guys hanging around the bottom hoping to get a glimpse of a thong or even a shaved pussy. When she came back I could see the young men nudging each other as they looked up her dress. She then handed me her thong and said she wanted to dance alone on the dance floor. She slithered onto the dance floor like a snake looking for its prey then begun to dance in her very erotic style. It wasn't long before she was joined by a couple of wannabe young bucks with bulges in their pants. After a couple of dances she came back over to where i stood giggling to herself. When I asked why she was giggling she told me that one of the guy had pressed his bulge into her bum and she could feel his hard cock pushing into her butt crack. I turned to her and said "next time he does that, put your hands behind her as if it was part of her dance and get a good grope of his bulge and give it a nice squeeze". Her face lit up with that wicked, mischievous smile of hers and she just turned and gone. I watched as the same two guys came dancing with her and sure enough the same one started to push his bulge into her bum. I saw her hands go behind her and his face was a picture. The floor was VERY crowded and I don't think anyone would have noticed if they were naked or not. She was playing with his "Bulge" for around 30secs before turning to face him. They started kissing deep and hard. She still had her hand on his crotch and was stroking it. I could see the hem of her dress moving, and not from the dancing. They moved into the crowd more so I lost sight for what seemed ages, but was for around 20 minutes. When she reappeared she was all sweaty and as she walked back to me I could see a clear liquid running down the inside of her thigh. She said that he wants to go outside with her, but I said this is something new and maybe next time. So we walked home with a few stops on the way home. We went back many times after that only on many occasions she went into the parking lot out back, but that's another story