For as long as I can remember, we have had adult predators going online posing as young girls/boys with different levels of malicious sexual intent. I understand that that isn't the objective here, but I can't help making that connection. Like "Oh! You weren't actually a 15 year old girl, you are a 30 year old guy pretending to be". That makes me uncomfortable.
The anime stuff always seem to be overly sexualized. Skimpy outfits. Traditionally sexy bodies (Legs, boobs, ass, etc. Yes, that is highly subjective but I think you can see my point).
Same goes for the furry stuff. Always the more or less "sexy", more or less "naked" looks. As an outsider it seems to be a sexual fetish more than anything else.
I have absolutely nothing against people wanting to be more fluid with genders. Or wanting to be sexy. Or roleplaying as whatever. I welcome that. It's just a bit weird that it's such a common choice to be [sexy child] or [sexy animal]. And in a setting that, to me, is not where sexy things happen, or where sexy things are even really wanted?