Saying that I am lazy while making a free-to-play game that I started to develop in 2017 on Flash, then completely redid from scratch on Unity when Flash died and did not finish until 2023 is the most hilarious statement I have come across. LMAO
This game is a visual novel, by the way. Alongside branding paths there's also a lot of animations and mini-games that need to function and work, including the final battle at the end. Calling this game not a lot of work speaks of your ignorance of game creation in general.
But just to humor you, suppose I added the option that the felines are all male, I'd have to completely rewrite 16 NSFW scenes. That's one. I don't know if you have experience writing, but I assume that you have if you're so confident that it's not a lot of work. It'll take a while, but not impossible. Then we have to redo most of the art. Most felines have two completely different arts in their NSFW scene, which are standalone arts in their classical art and then POV arts of a human in their redrawn art, which also moves, by the way. It's not one art you need to change, but sometimes five to ten different arts for one NSFW scene.
I need to pay artists for this. If you have ever commissioned something, you know that getting art is expensive. It's not an exaggeration that it'll cost thousands of dollars to do this for sixteen characters.
Coupled with the fact I'm also working on my second game and working a full-time job next to it makes it infeasible. I do not have the time, nor the resources to do it. But hey, I'm lazy, right? Since it's not a lot of work, you have my blessing to do it yourself. I'll come back to you in a year from now to see how things are going and to see if you're still of the opinion that it's easy. Good luck!