I guess if your a boy or girl (Accurate!)

I can guess your gender within some proper questions. 99.9% Accurate.

1 What do you say after you've been give something nice?
2 How old are you?
3 How moody are you?
4 How many friends do you have?
5 What letter does your name start with?
6 You could at singing?
7 What gender are you?
8 Are you a geek?