Talk:Theriomorphosis Potion/@comment-37882783-20190708084146/@comment-10429980-20200704012506

If you want confirmation, one can point to many parts of the general settings info. For instance, MGE volume 1 "Monsters" section which states:

'''From their perspective, human men are like males of their own species. '''

And in World Guide 1: Relations with Monsters:

'''Though its form has changed, the urge to assault men is a deeply ingrained instinct that is a remnant of the age of the former mamono lords. To have sex with human men is one of the most deeply rooted fundamental desires that monsters have. The urge for sex arises from two strong desires, “lust”, the desire to seek pleasure from sex, and “appetite”, the desire to seek sweet essence, and they love to give into these desires. '''

While we have many such references, I'm not aware of any that indicate monsters "go after" animals for sexual purposes. What we do know is that they are interested in at least trying out many types of sex with their husbands, and for some that extends to the strange transformations like the theriomorphosis potion. And yes, I would wager it is included in the setting mainly for readers who have that kink.

Actual animals would likely be unsatisfying for monsters, at least on their own. Their essence would not taste like a human's, and would be weaker (animals have less mana than humans), decreasing the pleasure. We do know they use tentacle plants for pleasure purposes, but that's more like one would use a sex toy. And tentacle plants are something of an exception, being neither monsters nor regular animals and having  rather unique history. All the regular animals and mamono realms beasts we know about do not view monsters in a sexual manner as far as we know.