So you can't even argue your own point. Why make such a claim then? And even your point about it "not being 13" is debatable. I hope you are at least aware of Romeo and Juliet laws? Works just fine for most of Europe and Central/South America, where it's usually 14 to 15.

"it implies women in general."

No, it implies a specific group of women, namely those with such piercings.

Why do you focus on the word "expectations"? The definition you yourself posted in this thread clearly mentions "hopes OR expectations". I think the use of the term "disappointment" in this case refers to the "hopes" part. You can hope for something from someone without expecting it from them.