Self preservation

It certainly looks like a nice cock to ride, but you're not so far gone that you're willing to go that close to those teeth. You'll try again when he isn't busy snapping at you.

Once you're right at the back of the cage, he stops gnashing, and instead turns his attention to the lock. A sharp claw is extended into the keyhole, and you hear frustrated grunts as he tries to pick the lock. He even tries to take a key hanging from the wall, but yelps in pain the moment he touches it.

Your burning need for cock clashes with your desire to avoid those teeth, and a couple of times you catch yourself creeping forward, only stopping when the teeth start coming at you again.

It is a long night before he finally turns back and collapses, exhausted. Unfortunately, his dick is just out of reach.

=====

He wakes up slowly, and then visibly panics. "I didn't bite you, did I?" he asks as soon as he sees you.

"No..." you whine, "but you didn't fuck me either. Am I not fuckable?"

"I refuse to have sex with you while that parasite is in you."

"What parasite?"

"The one that's living in your womb right now, making you think you want sex."

"But I do want sex!" you wail. "I want you to pound my cunt and fill me with that wonderful baby-batter."

"No can do, lady." He turns and leaves the cave.