>All these faggots complaining about magical realms
You know that the secret is to just roll with it instead of complaining, right? There are two things that can happen.
Best case scenario:
>Player: "I want to play a cute catgirl that ends all of her sentences with nya~"
>DM: "Alright, I'll make a custom race for that. So what class are you playing as?"
>After a while, everyone gets sick of the "nya~" (including the player) so it's dropped
>The catgirl just becomes a female rogue who happens to have ears and a tail
>Sometimes it comes up in a scene (like some nobleman commenting on how weird and unnatural it is) but other than that it's all good
Look: a fun game! And all because you rolled with it and didn't complain like a bitch about how weebs ruin everything.
Worst case scenario:
>That Guy starts pushing his fetish on the group
Just stare him in the eyes, drop everything, and intently ask him to roleplay the situation. Don't be afraid to ask embarassing questions like
>"So what are you doing to her exactly?"
>"Would you like to shit on her chest as well?"
>"Are your balls small, tiny or diminutive?"
>"Please, tell us more about your repressed mommy issues. We're all dying to hear about it"
Just like in the best situation, the player's social awareness will eventually be used against him. After this has happened, you simply form a gentleman's agreement to never mention what had just happened again, and the game continues as if nothing had happened. Once again, a game is saved because you didn't complain like a bitch.
tl;dr: Don't be a bitch.