thinking with portals

This tag describes characters using inter-spacial portals (often similar to those depicted in the Portal series of games) in amusing or unconventional ways (that is, ways that aren't transporting oneself instantly between two spatially distant points).

Frequently this involves characters inserting their genitals or their part of their body into one end of a portal, while facing another to perform sex acts on themselves; alternatively, this also typically involves a character using a portal to remotely access another character's genitals or anus, creating an inter-spacial living penetrable sex toy or dildo.