Hey, no I don't. It was just a default pronoun I guess, not thinking about it too much. Didn't know them before your post. I think they/them can be used for any gender right? In the case you don't know their preferred pronouns it seems to be a good option

They're gorgeous

I am almost 100% aligned with you but I think there is a point to make that there are differences between the right for any adult to create sensual and sexual desire no matter their body type AND gathering and fetichising on young looking bodies or adult bodies that could be perceived as juvenile