Why do people use the word sex-ing or better yet why is this word allowed?

Answer 1

That is a term for determining the sex of an animal. It is a good idea to "sex" your hamster prior to purchase, or you may obtain a pregnant one, like I did.

Answer 2

The term "sex-ing" is a colloquial term used to refer to determining the sex of an individual or animal. It is considered acceptable in informal settings or specific contexts, such as in Biology or agriculture. However, it may not be appropriate in formal or professional environments where a more technical term like "determining the sex of" may be preferred.