"I mean, I guess I don't want it to hurt."

The tentacle prodded at your tight opening. It was easily twice as thick as your penis, and who knows how much longer. The lubricated arm pushes itself into your hole, forcing a moan from your lips. Your tiny dick immediately gave rise as the tentacle pushed further inside you. 3, 4, 5, 6 inches deep and your cock was fully erect. That's when the tentacle stopped.

Relieved, you were ready for it to leave your asshole. The tentacle pulled itself out slowly, before exiting quickly and allowing your anus to relax.