Buy open cup lingerie and know you are wearing some of the sexiest lingerie on the planet. Open cup or open bust or cupless all describe the same thing and that is purely sexy. Wearing these garments is like wearing nothing at all except the breasts are surrounded by sexy, soft and colorful material that is like putting a painting in a frame. This highlights her bust and that is a great idea when you think about it. Wearing open cup lingerie is one of the best things a woman can do in the bedroom.