Right now the safehouse has the masturbate option to lower lust (or at least I think it lowers lust?), and I assume having sex with NPCs/Mobs also lowers it, or at least the framework for it doing so exists. "In the field" solutions could be stuff like a tablet with porn (using the excuse that the player gets bored with the material after use, to explain why you need to use/find another one), some kind of auto-masturbator that has a single/limited uses, and lust-supression pills of course.
Balancing cosmetic apparel with stats in a game with a paper doll is kind of tricky IMO. Since you want the player to be able to control how their character dresses, but also want them to gain stats. I do think it makes sense for something "sexy" to make the player do more lust-damage, and something like Combat armor to reduce how much damage they take.
One idea that did pop into my head is the player being able to modify certain gear pieces to become "sexier", like turning "Combat Pants" into a "Combat Thong"