I wanna answer too... There's no checkbox, but this is a fun and interesting question.
I am the oldest of 6 kids, 2 girls, 3 boys and a me.
Myself and my eldest brother (20 and 18, respectively) are full siblings, born from my bioparents.
My eldest sister, age approximately 14 or 15 now, is the child of my stepfather and his exwife, so is a stepsister to me. She has not been seen by us since age 4.
My youngest sister is 11 as of actually, 2 hours ago, and is the child of my bio-mother and my stepfather.
My youngest brothers are identical twins and are 5 years old. They are the children of my biological father and my stepmother.
I have often wondered if my issues with gender are not caused by the fact that I was meant to be a boy and treated like a boy until the day my eldest brother was old enough to do kid things, at which point I was suddenly expected, at about age 5, to have perfect feminine behaviours and act like a debutante, with perfect manners.
