I have found that book disturbing for my entire life. Why on earth did they give it to you?? What's their perspective?
They have given it to me for my twin daughters. So not really to me at all, but to me for them. (But the book is a novelty to me as I didn't grow up in the US and have never seen it before).
When I have asked what the story means to them, they have all replied with some variation of "that's how love is". And yes, disturbing is the perfect word. It makes me wonder and fret a little for the hearts of the friends who have given this book to us.