Alice figures it out...

Alice's pussy throbbed as she sat there beside Cassandra. She looked over at the girl and thought about how wonderful it would be to have the redhead lick her slick, wet pussy; how good her slender fingers would feel inside of her. She thought about her smooth calves being kissed by her own pouty, soft lips. Alice took a deep breath as their eyes met, and Cassandra's hand seemed to involuntarily raise itself to Alice's right breast, and her own moan slip from her lips.

Alice closed her eyes as the Auburn haired beauty groped and fondled her, her own hand running up the redhead's thigh to her bare, alien sperm-encrusted sex. Alice's mind balked when she slid a finger, and then another, into Cassandra's dripping wet sex in the gloomy cave.

She barely registered her own motion as she dropped to the cavern floor, hoisting the redhead's leg over her shoulder as she plunged her hungry tongue inside her sex. The pollen floated in the pale light as she licked and slurped and sucked the cum out of the woman while relentlessly plunging her own fingers into her sex, seeking her G spot and rubbing her lips between thumb and forefinger.

It was Cassandra's moans that brought her back. "What am I doing?" she thought. Alice had never been a lesbian, but she was currently drinking ounce after ounce of Primate Mantis jism from a woman's crotch while furiously fingering herself. She couldn't stop her smooth tongue from encircling the woman's clit, and felt a rush of pure lust when Cassandra bucked and smeared the combined liquid sex all over her face. Suddenly, she came. Cassandra's thighs locked around her head, and Alice could just barely snake her tongue toward the other woman's clit. It the darkness and pressure, it became clear:

It was the plants. The animals on this planet were sex-mad because of the plants she had waded through. Everything she had encountered so far had been either subterreanean or high above the ground. Whenever she crossed the terrestrial boundary, things took a turn toward the sexual, present company included. She looked back at her own willingness to give in to the creatures desires. Lust had driven most of her choices. She appreciated the adaptation the plant life had made, like the sweet nectar of a flower attracting a bee to cross pollenate, what better way to spread the seed than have all the animals shaking fur and fucking everything they encounter?

When she came out of her reverie of illumination, she found that she had worked her left index finger into Cassandra's asshole to the second knuckle with the girl writhing in exstacy above her.

It all made sense. The pollen on her skin was driving the locals mad, and in return was keeping her alive... Just then, she felt her tongue slide inside of Cassandra as something slid over her calf on a hundred, individual legs...