Another experience. Once I went to a friend of my office boss taking a message of him. It was late afternoon. I rang the door bell. Young daughter of my bosses friend appeared. She had just taken a shower and having very thin night dress with white panties underneath. I could clearly see her panties, thighs and her naked body through her night dress. I got excited someway. But I did not show that. She also got excited but did not show it. I asked for her father and she said "He inside and I will call him" and went inside. When she returned she was having a house coat over her nighty. But it also was very thin and I could still see her panties through both of them.
I have several experiences of seeing panties worn by women and girls through their nightdresses, skirts, shorts or trousers. Normally they are wearing thin and transparent dresses. Once my office was in a highly populated residential area in Colombo. It was not a posh area and mostly poor and middle-income families were living there. There was a girl in her early 20s then. I used to go to office every morning. Several time this girl -- pretty and pair of complex -- used in front of her house in her thin nightdress having panties underneath. I could clearly her panty-clad back and/or thighs through her thin nightdress. I could easily see colour of her panties and even any printed design in it. I think she noted I was looking at her and I clearly saw her panties. But she didn't care. One day when I was going to office she was attending to flower pot outside her home bending down and turning her back to the roadside. It was a nice scene. I got erection. But could not be seen due to my underwear and trouser.
Some girls and women in Sri Lanka wear panties under their night dress. I think it arouses sexual feelings than having nothing under their nightdress. One of my wife's best friend who was living near by to our place used to do so. Some morning I used to visit their place taking some messages from my wife to her. Then I have seen most time her in her nightdress having panties under it. Normally her nightdress was very thin and transparent not like my wife's. As I used to have my underwear under my shorts when I visited their place even in the morning, I did not face being embarrassed seeing clearly her panty-clad bottom and thighs through her thin nightdress. Although she was not much beautiful she had a nice figure those days.