[with no delay the tentacle goes from probing to pushing, sliding easily inside thanks to its size, but is soon pulled back and replaced by something much, much larger and covered in some sort of slime]

[his legs are held open wide and his body tilted back as the new tentacle jams inside of him, pushing hard and squeezing to fit and fill him in one relentless grinding motion]

[the tentacles around his body caress his skin and wrap around the base of his erection, but give him no other relief]