Why do people keep giving me advice?

Note: If i haven't explicitly asked for your advice about my pregnancy or birth process, it is probably because I don't want it.

Recently at a good friend's birthday party, a well-meaning acquaintance started asking about my birth plans. I don't know this woman very well, so I was vague. For one thing, I'm not going to go into detail in the middle of a friend's 40th birthday party. For another, it was none of her business. But also, I was vague because the whole thing is still very muc...