Be careful, it's my heart, It's not my watch you're holding, it's my heart. It's not the note that I sent you that you quickly burn, It's not a book I lent you that you never return. Remember, it's my heart. The heart with which so willingly I part It's yours to take, to keep or break, But please, before you start, Be careful, it's my heart.
https://primoaccordo.net/frank-sinatra/be-careful-its-my-heart.htm