Working as designed! Tried latest dev version?
That was an unintended exploit. Still, if you regularly inflict pain on your slave she will develop into a masochist eventually, unless she has the opposite trait (afraid of pain). Conveniently, as slaves become more devoted they also are more likely to feel guilty about not doing their best, giving you a reason to punish them “with cause” even though they are obedient. Or you can just punish them without guilt, as fear and despair fade quickly on a devoted slave.
nympho = lots of orgasms (sea tentacles / fiend milking training at high arousal are good for this; if you are in a hurry, aphrodisiacs increase arousal)
exhibitionist = lots of shameful activities (demonstration lessons, erotic bondage, shaming punishments, group sex, many other things, search “shameful = 1” in the code)
pervert = lots of disgusting activities (feeding her fiend semen usually takes care of this one over time even if you don’t do anything else that qualifies, but there are plenty of activities tagged “disgusting = 1”)
For all my knowledge of the game’s internals, I still get surprised when I play. There is no substitute for trying things to see what happens.
Collect all the trophies.
Tips for income? Develop other sources. Barn, colosseum. Sell slaves at auction with multiple specializations and high charm/prestige to attract more buyers to bid against each other.
Let us know how it goes.