Skirts and Dresses are good for hiding a girl under you while she eats you out in public.

Like a college girl getting her cunt ate out by her bored classmate while sitting in her seat in the middle of a lecture, with no one noticing it because of her skirt and the desk cover her friend's busy mouth, the reason for the public sex was that the lecture was boring and one girl wanted to entertain herself by eating some pussy, the girl getting ate is just a classmate of hers, not much is known between them except that one wouldn't mind getting her cunt made out with in the middle of the lecture course, and she's trying to keep from letting anyone catch on to what is actually happening, she doesn't want the the girl between her legs to stop, but the wild thing is really into it and much better at it than anticipated, if she doesn't come to her senses and hold back a bit, she might wind up exposing what is happening to the whole class.

mermaids are a popular fetish for lesbian girls.

two girls go to a beach they are playing around when something under the water undoes their bikini bottoms and starts eating out their asses and pussies, the girls have no idea what's happening, but it seems like multiple people are below the water, forcing oral on the parts of their bodies below the surface, nothing can be seen but flowing green hair that they previously assumed was something like algae or seaweed, hands are holding them while tongues and lips move around and inside their bodies, more come and take off their tops, now their breasts and backs are getting licked and sucked, the girls are scared and try to resist, but their hands are grabbed and held as they continue to get gangraped below the surface, the mermaids aren't trying to drown them, but rather they are aquatic succubi in a feeding frenzy on the girl's pleasure at he sensation of the tongue bath, the mermaids move across the bodies of their victims, changing places so that all of them could be tasted by the school of hungry sea monsters.

the mermaids aren't half fish in a the literal sense often applied to their depictions, rather they appear as a humanoid species of aquatic peoples, a species that breathes both in water and open air, with scales and gills, vaginas and breasts, clearly inhuman, but strangely erotic in appearance at the same time.

the swimmers are pulled under, now they can see the gill-girls for the sexy monsters that they are, these girls will take turns feeding them oxygen with their kisses, the girls cannot help but convulse in pleasure at the embraces of their rapists, eventually their minds break and succumb to the pleasures of the school, they are taken to the underwater entrance of a cave set upon the small island in it's center, and they move on to being the center of full-on lezzing out with a group of these creatures, who smell and taste of sex and the sea.

the human best friends are withdrawn from, falling into each others embrace and they fuck and put a show on to their captors, who watch from the surrounding water as their energy returns to them, the monsters resume their attentions, climbing upon the two wet lovers, as the orgy resumes.

the two fail to recognize in the throes of their passions that they are transforming into the things that attacked them, later they will join up with the next hunt, eager to love another human girl who enters their watery territory.