I used to work with a woman who wore nearly transparent bras. Which is fine and dandy when what's on top of that transparent bra is opaque. And, naturally enough, her tops were nearly transparent too. Big fuzzy white cowl next sweater (back in the '70's) that, while beautiful, could have used a full camisole under it and not looked bad. This woman liked the male attention; thought all the women doing double takes were funny, and just did not CARE that her nipples were showing through 2 layers of clothing. Personally, I find headlights much harder to disguise, and there's a limit to how far I'll go to do so, but there is NOTHING difficult about hiding the darkness of one's nipples through one's clothing. It's easy peasy, and I find people who refuse to do so a bit distasteful. Purely my own opinion, but such it is. IMO, underwear is to provide support and masque finer details of one's body, and the outwear is to do the rest of the cover up job. Fashion not withstanding!