Guess their premise is just not solid enough for you, eh?
Nah that can't be it, I don't have the same problem with ghost girls and other non solid enemies after all. Dunno slimes just don't work for me, can't put my finger on it why.
Yeah methinks this game is the first one that features enemies in that age category - there's also a second one. ...sadly.
Now come on my dude, theres like around 45 enemies, probably 2-5 monster girl type enemies like the tentacle monster or the horse girl, if theres 2-5 enemies that are the same age and body size the protagonist has that would still leave between 35 and 40 enemies that are the usual THICK body type and much older than the protagonist, I welcome some variety even if it isn't exactly to my liking like with the slimes. Actually some of the girls, like the harpy for example, have so ridiculously thick thighs it actually looks too stupid for me not to laugh about it whenever I see it.
New post goes into more detail how seduction poses increase the mcs excitement bar, which can lead to abnormal status effects and having much less time before blowing the load when actually placed in a hold. It also mentions that some enemies, like the harpy, have the ability to call reinforcements, and the reinforcements can themselve call more reinforcements so that a 1vs1 can quickly turn into a massive 1vs 10 fight, though the new enemies called seem to be a lot weaker according to the post, but some bosses can do it too so that sounds like a pain in the ass, but if I understand it correctly there is a skill available to prevent that from happening.
Rest of the post goes into more detail about the battle archives and the character masturbating when he gets hit with too many seduction type moves, not really all too interested in these. He also mentions the zoom function available during scenes.