A few ideas. Bolded roles are mine, to calrify things.
Two siblings. The Brother, the eldest of the two, has taken an interest in his Sister, who is younger by a few years (21 vs 17/18)). He has been introduced a couple new kinks to his collection, from late nights of internet searches: spanking. He can't stop thinking about it, what she could look like, bent over his knee... This idea can include other kinks, except footplay, scat/piss/vomit.
#2 my young male human is desperate for work, and winds up at a strip club. Not just any club: a creature club. It's run by werewolves, shapeshifters behind the scenes, and it just so happens that the club owner hasn't had himself a piece of human flesh in a looong time. Blackmail, noncon, fur and fangs. I can play either, but I am picky on personality types for the human.
#3 a line featuring a female adventurer who stumbles across an ancient ruin, sets off a mystical trap, and comes face to face with a monster. What the monster is, is up to you, on condition that it's not a humanoid. Eg vampire, shifter, witch/wizard.