Try removing fetishes from yourself. For instance, if your character likes masturbating, any finger-based penetrative action will instill more lust. Same for any applicable behavioral fetish, like Voyeurism while watching Lilaya and Rose. It is a trap I keep setting for myself and triggering when I make a character. "WHY AM I SUCH A TWO-PUMP CH- oh right the fetishes."
As long as you have corruption-gating turned off, you will be able to perform the action, so don't worry too much about applying fetishes to yourself, unless you are a really devoted role-player.
Since magic is at its core coom-powered in this game, any NPC with a sufficient arcane stat treats lust like a shield. It is typical of anything demon-related (except imps), mythological creatures, and some 'standard' races like capybara, but occasionally you will find a random NPC that has a high enough arcane to power through the horny. I think the required score is 10.