Intra-System Relationship

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An intra-system relationship, also called in-system relationships, in-house relationships, or internal relationships, is a relationship by two headmates which takes place within a system. These relationships are often just as beneficial and full as an outer-world relationships.

History
The concept was discussed in the Love and Sex issue of Many Voices in 1993, though not under that word. The term "intersystem relationships" also referenced by Dark Personalities in 2001.

It was also discussed on the Multiplicity LiveJournal, under the tag "relationships in-house".

The term is also referenced in the Multiple Code Redux.

Related Terms
Terms for system members who are attracted to others of their own system include SMLSM (system member loving system member) and Plurillean. Sysian or sysmasexual is a headmate who is exclusively attracted to others in their system.

Aepluric is a relationship within a system where all members are involved.

Intuspluric is a synonym.