Cut Me Up, Break Me Off Baby, Don't Let Go 'Til I Can't Breathe

Bondage, anyone? Chains, ropes, whips, cuffs, studs, and a whole lot of structure. This is a huge motif for the spring collections, and if done well, can be both appropriately subdued and still very hot.
A harness-like neck with a strong belt at Christopher Kane

Ropes at Givenchy

A handcuff-style black leather bag at Lanvin

Chains and spikes at Giles


Corsets at Alessandro dell'Acqua

Black leather and strong belts at Gaultier

All pictures from style.com