I once bought a black dress in a charity shop and said it was for a fancy dress party, I asked if I could try it on and put it on in the changing cubicle, the lady on the counter said, "let's have a look at you" and of course I did as asked and she said it will do, so I bought it, the other ladies in the shop saw but didn't say anything to me. Of course I was properly underdressed in panties and tights and had a little padding in my bra which was noticed, true story.