Glad to see my work is appreciated :-)

The blowjob trainer :

This is an entity that won't release the maso until she's been able to give a perfect blowjob.
One part of the entity stands in front of the maso, receiving and analizing the blowjob, while the other stands behind, torturing the ass and genitals with a wide variety of tools (fire, whip, electricity, all kinds of dildos, probes and pipes equipped for all kinds of internal torture…)
The maso must give a perfect blowjob for 30 minutes, without her mouth trembling or showing the slightest reaction to what's being done to her ass.
The violence, nature and rhythm of the torture are sustained and very high, but random.
Of course, the tortures are often extremely brutal and unexpected, so a total lack of reaction is almost impossible, and most masochists are stuck there for weeks before they get lucky.