UnknownDyson
Explorer
In one of the Castle Perilous novels there is a description of how an incubus can provide pleasure in ways a mortal cannot. An npc wizard had discovered a low level succubus hiding from punishment, created a ring to control her and used her as an information source to summon incubii and other beings to entertain a wealthy noble lady who paid for most of his research.
One of my players plays his mage as a person who only summons beings to do his bidding. (Similar to a conjurer adept from Shadowrun) discovered this and decided to take the ring as his own. He "failed" (failure is subjective to point of view) at several solo quests to find a way to take the ring through magic, including giving a charmed hireling to a green hag and becoming her lover, he decided to summon a being well beyond his control. Of course he thought he could control it. The succubus was rather persuasive.
During a siege the player calls upon the balor, the one being that owed the succubus a single debt which was called in. The balor turns on the npc, basically flays him and removes the hand wearing the ring. Both the player mage and succubus wrestle for the hand while the other two player arcane casters in the area are fouling their clothing as they try to rectify the situation.
The players managed to survive mostly due to one player making a deal with the balor. No one really got what they wanted in the end. Each lied to the other characters and npcs when the time came to recount their parts in the siege. Because the city was saved their actions were deemed to be good just accomplished in the wrong way.
That sounds like burn after reading.