DnD Sex Edition

Troglodytes, reptilian humanoids, are one of the oldest intelligent races. They commonly dwell in caves and their society is a series of tribes each ruled by the strongest troglodyte. The tribes are known to war with one another and troglodytes prey on creatures deemed weaker. They are able to blend into their surroundings similar to chameleons. Chameleons use their color changing abilities when seducing a partner and they are amongst lizard types that have bifurcated hemipenes (double dicks). 

The troglodyte darts forward, raising the spiny crest on its back and lightening the gray of its scales. They nod several times, wafting a pungent stench of overflowing sewer and sulfur towards you.

Make a DC 5 Performance check to see if the PC can tap that troglodyte.

On a success, male troglodyte: The thick meaty arms of the troglodyte wrap around you, enveloping you the rotten egg scent of the beast. His scales are dry and smooth in the mottled gray. You reach up to stroke the erect spines on his crest and are rewarded with a guttural growl of approval. Clawed hands begin to rend your clothing in quick tears, leaving you bare in the arms of this creature. He turns you easily, bending you forward, ass up, amongst the tatters of your ruined clothing. A stiff, dry cock probes at your entrance and slowly presses into you. The beast thrusts shallowly a few times until he can move in and out of you freely. As his thrusts become deeper, you feel a second blunted phallus strike you dully. A clawed hand curves around your hip and the second phallus is pressed to your opening. The stretch intensifies as both scaled cocks open you up further. The troglodyte’s grip on your hips tightens and it begins thrusting in earnest. The thicker bases of his cocks stretch you until you are panting in the putrid air, practically tasting the grotesque sewage of his unique aroma. He continues thrusting until you grow numb to the scent. Your hands lose feeling, pressed against the cool cavern floor. Your legs begin to cramp from the positioning. Still, he continues thrusting, taking the pleasure you offered him. Nearly an hour later, the steady rhythm of the troglodyte increases and you are suddenly flooded with a double load of cum. The beast removes both cocks with a squelch and shoves you forward. When you look back, the creature has disappeared into the shadows.

On a success, female troglodyte: The thick meaty arms of the troglodyte wrap around you, enveloping you the rotten egg scent of the beast. Her scales are dry and smooth in the mottled pale gray. You reach up to stroke the erect spines on her crest and are rewarded with a guttural growl of approval. Clawed hands begin to rend your clothing in quick tears, leaving you bare in the arms of this creature. She looks down at your phallus, standing erect and ready. She offers  a disappointed sounding “tsk” before uttering a few words in a gutteral hissing language (Draconic in Pathfinder; Troglodyte in 5e; if the PC speaks the appropriate language, she says “Only one?”). She shoves you to the floor amongst your ruined clothes and darts out of reach, disappearing into the shadows.

On a fail: You are sickened by the overwhelming stench of rotten eggs and gag audibly during the troglodyte’s mating display. The reptilian beast notes your weakness to its scent and gives a leering grin. Abruptly, the creature lunges at you. 

Initiate combat. Troglodyte gets a surprise round.