Name Change:

DS action where the Dominant choose a name for his(her) submissive, helping to transform the submissive into a "thing" (we give names to our pets).

For some submissive, this "new" name helps them to get into the "submissive" mood. (Conditioning).

Nipple clamp:

Toy used in S&M play. kind of clamp specialy design for the breast.

Nudity:

Getting undress, nude.

Force nudity:

Could be use as humiliation or simply for the pleasure of the Dominant