About a year ago my wife and I were staying in a hotel. I like men looking at her but she is quite shy. I was out in the parking lot and called her on the mobile and told her I was oming up and asked her to strip completely and answer the hotel room door to me and she said she would providing there was no one else around. I was walking along the corridor and there was a guy walking behind me, so I timed it so that I got to the door and she opened it just as he was walking past. She was wearing only little white panties and she was really surprised and shouted "OmiGod", but I went as slowly as I could and he had a good look and walked on smiling.
The next morning at breakfast he was with another 3 guys and when we came in to the restaurant, he leaned over and spoke to them and they all looked at her - especially her jumper - and she said she found that even more embarrassing.
I posted some pictures that I took right after she flashed the night before and they are at
https://forum.oneclickchicks.com/showthread.php?t=36963
And of course the avatar on the left may give you some ideas....