Harpy

A typical bird monster. Though there are some slight differences between Harpies, they generally have the same behaviors. Primarily herbivores, they generally feed on nuts, vegetables and bread. Though they don't feed on male semen, many Harpies are eager to mate with humans. In addition, they are known to forcibly kidnap men and force them to marry them.

In a form of female domination, they will force men to mate with them for reproductive purposes. Forcing men into them, their feathers tickle the male's body as the Harpies soft vagina quickly forces the men to inseminate them. The unique and forceful nature of this mating usually forces men to inseminate the Harpy within a minute.

If their partner has high quality sperm, the Harpy will force them to ejaculate many times to ensure fertilization. It's not uncommon for the mating to continue uninterrupted for multiple days in a row.

If the Harpy really enjoys their mate, they will continue to have sex, even if not for reproduction. A man forced to marry a Harpy will be unable to rest, and will spend all most all their time in intercourse with the Harpy.