BDSM is an acronym for bondage and discipline (B&D), dominance and submission (D&S), sadism and masochism (S&M). BDSM on or web sites in always a consensual activity of adults and includes mainly humiliation, torture (for example CBT – cock and balls torture, wax play, ...) and submission.
Bondage (shibari, kinbaku) means 'the beauty of tight binding'. On the pictures we do not use only ropes but also handcuffs, clingfilm and sello tapes.