When I used to watch the ladies model underwear and shapewear for the Home Shopping Network and QVC, I used to watch carefully for wet crotches or hard nipples. Never saw any.
I think that they probably don't openly think about it but at one time, pre Internet, I don't think it would shock them that young men and women did wank to them but probably not today, porn is much easier to find today
God I spent from puberty until I had porn doing this. And any wet T-shirt competitions I could find on tv
I worked at HSN in Clearwater. The models never wore bra's. A) It made it quicker to change into the next item. B) the outline of the bra would detract from the look of the blouse/top that the model was wearing. Good times.