All you offered was your own definition of need, which might seem like common sense to you, but who cares?
The more rational standard of treating a non-functioning, or malfunctioning body part or process seems adequate enough here.
No, it will not lead to your death. Neither does it really hinder anything but your pleasure. Oh God help that a man can’t have his sex. Monks and other good people have managed no ejaculation and they have lived long with no intervention.
Defecating with a colostomy bag is NOT natural and REQUIRES surgery - medical procedure.
There just is no comparison. Absurd.