Lourdes Leon—the 28-year-old daughter of Madonna and Carlos Leon—went braless and bared her nipples in a see-through catsuit ...

Showing the straps of your underwear beneath a put-together outfit ... Wearing the spaghetti-thin straps of your G-string (yes, it had to be a G-string, Brazilian knickers wouldn't have achieved ...

Its purpose expanded from practical underwear designed to be unseen under clothing to a fashion piece meant to be subtly ...