Talk:Human/@comment-1.9.100.58-20150123093513/@comment-24376783-20150123115057

Incubus: "Besides genital gargantuism, Incubi do not receive drastic physical changes comparable to, say, an arachne's abdomen or a succubus' wings and tail. They do, however, see away any features that impeded their sex lives previously, like corpulence or the general frailties of old age."

Corpulence and frailties of old age are just examples, but it says  any features that impeded their sex lives previously. This would obviously include genetic disease.