I was once playing a game with my wife where we were daring each other to do crazy things in public. One of the things that I dared her to do was dress in non-tzniusdig clothing in a public place. She took me to a big clothing store (like Macy's) in a non Jewish neighborhood. She tried on - from the store - really tight jeans and a very tight see through black top and we walked around the store for a few minutes that way. She looked very sexy and we even took some pictures with my phone. (she dared me to walk half a block with my penis out, which I did on a quiet street in Manhattan after 12 at night.)