Sounds good.
The solution to having a more sexualized female form can be easy to pull off.
This is from a game called Good Boy. Notice how curvy and sexualized the woman are. I imagine the reason they're patrons are low is because of the gameplay, but the important part is the animation and the simple drawings of the female form, and how they're sexualized.
The curvature of the women's body is based on what men find the most appealing on various polls across the internet.
You don't have to make them that thick, they can be athletic too.
I'm purposely showing very basic art, which can easily be segmented for animation, based on your needs.
What's important is the gesture, curvature, and sexualization of the female form.
IMO, you already have the mechanical system in place, now the women just need to be more sexualized, more erotically artistic to produce sexual stimulation.
The simplest thing to do, IMO, is to simply draw the most sexy woman you can, then segment her for your animation purposes.
Another way to look at it is this, I see your existing female characters as placeholders for more erotic versions in the future.
HOWEVER, if there are enough people aroused by the existing characters, then it means you did find a niche of people who do find your art arousing, but it doesn't do it for me, but I think it can be easily rectified. You could literally just find hot drawings on the internet, and just trace over them lol, then segment them for your animation system.
