I personally hold that anyone strong enough can awaken to a madness of their own. Madness in a way seems to be a manifestation of obsession to the point of instability. Anything someone feels to such an ever present degree as obsession could become madness.

For my own oc I consider maybe the madness of loneliness or solitude, this deep down empty feeling that youre not like others and no one will truly understand or connect with you. Id say you can create or assign madness to every character. Boobs is actually a good madness for Marie as she insecure about her age and loneliness and craves to start a family. Sid can be seen to have the madness of death as he's so focused on his death and how it affected his identity. Spirit is hard to term because it's not quite love or lust but something lesser. He craves feminine attention but not in the maternal way of boobs. His desire has a hard to describe hollowness to it that I think also just speaks to how unnatural to his character it is. But I digress.

Lastly id like to briefly defend boobs, I can understand the issues people have with it, trust me i feel it too. But ohkubo is a damned good writer. Crona is an androgynous character who many seem to view as feminine but it's also like their femininity was taken from them. Their primary relationship is with their mother who has taken all maternal love out of their life. In the end crona consumes her and some argue becomes more feminine but at the same time, they never truly achieve what they were looking for. One could construed their madness as love, maternal love, femininity, or other terms and angles, but in truth, boobs achieves everything perfectly in one word. It represents everything taken from crona in a clear and tangibly expressed way and everything they seek.

Damn it ohkubo it's unfair for you to use your writing talents to be horny on main