At the moment, people seem split evenly on the question of whether and how chyaste men ejaculate in my third sex stories. What's interesting is that most people either want orgasms through anal sex, or spontaneous ejaculation without orgasm.
Since Chastity Planet already has the possibility of anal sex, my instinct is that chaystes don't get to orgasm; I don't want it to be about needy men pestering women for strapon sex, I want self contained men who pay for wild erotic activity with frustration.
But I'm also tempted by the idea of creating a slave gender. Suppose the alien device lets you orgasm through anal penetration, but only with one person. So, get drunk and seduced into a one night stand, and now there's only one person in the entire world who can make you have an orgasm... you'd have to be pretty careful who you let near you with a dildo.
(Orgasm could simply cause loss of will, but though that makes a great fantasy, it makes for a poor story.)
I suppose it depends on whether the aliens are orgone harvesting, or social engineering. If social engineering, then it's straying into the territory of chastity planet.