Talk:Incubus/@comment-45424649-20200822100512/@comment-10429980-20200823120804

Oh, didn't mean to imply that they only "feel" healthier, just that in cases where the man was of normal health and build then he may not notice changes other than how he feels even better. Incubi do specifically change physically in regards to being healthier-looking, to quote World Guide 1:

'''The body changes to become more healthy and durable so that it's convenient for sex, but it's rare for the appearance to change greatly other than that. '''

As for strength for the sake of sex, that seems to be more durability rather than strength. Incubi explicitly do become very durable compared to regular humans, and this allows monsters to ride them for long periods (as well as protective/supportive effects from their mana). Raging mushrooms are used if the monster or man wants the man to at least appear to have more strength during sex. That is, assuming he isn't willing or able to put in the work to actually become physically powerful.