Reading these posts and casting my mind back I realised I have one experience and lots of second hand stories relating to this.
My own experience was when I was a kid, a married neighbour used to undress in the evening with the curtains open, a friend and I used to sit on a wall and watch, no idea if she was aware but we were hardly subtle lol. I don't remember how this came up but I was telling this story to my mother-in-law, she told me that she used to live next to a woman who would do this regularly and a large group of boys would gather on the road below. You'd get in big trouble for that type of thing now and it's messed up when you consider it but I doubt the boys were complaining to anyone. My MIL also told me that her neighbour a few years ago would also undress with the curtains open, as it happened her neighbour was a very hot woman who I went to school with. My MIL told me that she used to catch her partner enjoying the view lol.
Now the hot stories from my wife
When my wife Maggie was at school she used to visit her female friend who had 2 older sisters and a young brother. Being the youngest and having three older sisters the brother got a hard time, when Maggie would visit the sisters used to tease the brother saying that he had the hots for her and he would go bright red. Maggie used to stay in the spare room which overlooked the garden, which had a tree house (you can guess where this is going). Each time Maggie would stay the younger brother would spend the evening in his tree house, this didn't go unnoticed by the sisters who took great delight in humiliating the brother by saying "Maggie's here! Time to run into your treehouse!". Maggie told me she felt sorry for the younger brother getting such a hard time, he was cute and she was flattered, so one night after a shower she went into the spare room, flicked on the light, stood in front the window and started drying herself off. She told me she noticed he was looking but didn't acknowledge him, so he got a show without the embarrassment and she got to pass it off as being unaware. A pretty good deal for the naughty little fucker and a very nice gesture from my wife I thought.
The last story involves my wife's friend Lisa. My wife knows I'm a fan of Lisa and will often tell me stories about her because I find it a turn on. Anyway, she went to lunch with Lisa and a story came up about some workmen on the building site opposite Lisa's house. Each time she would leave the house she'd get wolf whistled by these guys, it became a regular thing. One morning she was feeling horny so she went to the bedroom window in her dressing gown caught the attention of one of the guys, waved and gave him a quick flash. He shouts over to his mate who joins him and is rewarded with another flash. Four flashes and a group of horny workmen later and Lisa went to the shower and rubbed one out apparently. My wife told me this story and I sent a text to Lisa asking what building contractors are working opposite her as I wanted to apply for a job there. She replied saying bad luck, they finished last week.
