I saw a shop called "3D Lingerie", which was a most bizarre name.
I wanted to ask the shopgirl how their lingerie was 3D, but she looked blur and ready to cry at a strange question.
After lunch though, she looked better, so I asked her and she said it was about the Third Dimension.
I then asked if other lingerie was 2D, and she replied, "Cannot say like that... You know girls. Wear already is different -cups hands in front of chest-"
@chaosbutterfly: All lingerie is 3D. unless you're a AA cup.