Meruru

A sex-loving succubus, who appears in human's dreams to seduce and have sex with them.
She absorbs the semen of her prey, which is increased by their plesure, and converts it into her own life force.
Humans who fall in love with her won't be able to control their libido and will continue to seek pleasure from her until they die.
Her body takes the form which her male prey lusts over the most.
She would usually take the form of a cute girl, but in this case, due to her prey's unique sexuality, she unexpectedly took the form of a body with a penis.
At first she was puzzled by the strange change in her body, but she became curious to find out what a body with a penis felt like.