The color would indicate the type and experience of the HuCow. Pink was for new shy HuCows, and red for unruly/feisty ones (always use bondage with red plugged HuCows!). The system didn’t get used much since then, it’s not much help in daily life, but we have noticed that for some HuCows an anal plug takes their mind of harsh milking sessions. Valentina is still very scared, she needs a butt plug AND magic wand to help her through the milking sessions!
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