Being used by tentacles is quite the experience. Most trainees are repulsed by their slimy texture at first, especially since most of our dungeon-bred tentacle monsters focus on restraining their victims before harvesting their seed and juices. It’s delicious to see trainees trying to struggle against fleshy grip while countless smaller tentacles are trying to find their way towards their genitals. Eventually, the trainees are almost completely covered in tentacles while being penetrated, sucked and milked into ecstasy~ Depending on the size of the creature, such a session can last multiple hours until the thirst of the monster is satiated.

Hairy variants:
https://subscribestar.adult/posts/241331