Service-oriented (sexuality)
In human sexuality, Service-oriented is a term used in the BDSM community to refer to a relationship dynamic where the focus is on how the submissive can contribute resources to the dominant partner, and provide for some of their needs or advance their goals. Often, this will include domestic service, such as household chores, but can also include such things as chauffeuring or valet services. These relationships may also include romantic feelings or sexual activity, depending on the specific relationship dynamic chosen.
A common example of such a relationship would be one in which the submissive and dominant were romantically attracted and the submissive is collared to the dominant, indicating that they are "in service" to that dominant. The collar may well be predicated on certain performance levels or the usefulness of that submissive in specific areas. If those things were to change or dissipate the couple may remain romantically linked but often the collar will be removed.
For the submissive in such a relationship, the collar is seen as a status symbol signifying the approval and acknowledgement of a person they wish to serve. They often take great pleasure and pride in their status and relationship.
For the dominant, the benefits are practical as well as emotional. Many take great pleasure in being 'served' in this manner, and of course having the additional resources available is of immense utility.