Mermaidens
Homoquatica Pacifica Maris:
The Female Genus of Merfolk Mermaids.
They are known for being friendly and helping sailors in need.
Typically depicted as kind, lovely beings who live in the sea.
Some female members of the aquatic-human hybrids have two anal cavities in addition to sexual reproductive organs.
The middle cavity is not an anal cavity though, it is an opening specifically for massaging a male’s penis.
3 Holes
All order of Sirenia are extremely horny.
Mermaids love being made love to and as a natural defense against over-population, some have evolved a third hole. Specifically for pleasure.
To prevent impregnation, other hybrids will often just use their anal hole during sexual encounters.
Some Mermaidens have evolved an involuntary mechanism by which their genitalia glows and flexes when they are sexually aroused. This lets the male know she wants to fornicate.
When she is first aroused, her organs oscillate more rapidly. After being aroused for sometime, and usually after a few climaxes, the oscillations become more sophisticated glowing slower and flexion is more powerful.
All members of the Sirenia Order suckle their young,
therefore they have nipples and their tits produce milk.
The sensitivity in their nipples are greater than human females. They are extremely sensitive erogenous zones which easily can stimulate her to orgasm.