Spreader Bar

This character is involved in sexual activities while being tied to a spreader bar.

A spreader bar is an article of bondage equipment consisting of a metal or wooden bar which can be fastened to wrists, ankles or knees to hold them apart with ropes or cuffs. It's primary goal is to limit movement of the person tied with it and keep arms or legs spread to allow unimpeded access to the subject's groin and trunk.

NSFW Example 1
NSFW Example 2
NSFW Example 3