Tentacles that could take control of your mind without your consent and could cripple/end your future. I consider to be bad tentacles. Kinda like how the demons in CoC would drug you and throw you into the breeding pins without any cognitive ability to remember or think, if I'm gonna have fun, I want to at least be able to experience the fun, not have my brain turned off while it happens. I'd have probably enjoyed this creature if it mind reads all the consensual fun i had with the tentacles of Myrellion and then acted like the Mhen'ga parasite, allowing itself to be seen and not alter my mind by force. That would've calmed me down, instead it took me for a joy ride, disabling any cognitive action that may hinder the ride, and decided to make me call it "master", then removed any memory of it when the ride ended.
Sooo ya, bad tentacle! bad! *waves finger*