Sandworm

"A huge monster that lives in arid regions. It usually hides under the sand, but when it senses the vibrations of a moving human, it will attack them. forcing the man into her mouth, she will suck on them like a piece of candy. Her giant tongue can quickly force a man to orgasm. Once the man has reached orgasm, she will begin to to use her tongue to suck and lick up all the semen, forcing the man to continually ejaculate. Once she sucks out everything from the man, she will burrow back under the sand to await her next meal. Though she is very slow and absentminded, you cannot be careless around her.

Most desert monsters greedily suck up men's fluids to slake their thirsts. Great care needs to be taken when traveling through the desert, since being caught by a monster usually entails certain death."