I know we can use “how heavy” to ask something’s weight. But I am wondering can we use “how heavy” to ask for a person’s weight? Is it appropriate?
In the United States, it is generally offensive to ask for a woman’s weight because it suggests they may not be pretty. It doesn’t matter how you ask. There are probably some men who feel the same way.
As far as language is concerned, “How heavy are you?” is a perfectly appropriate sentence.