A nephew who called a boy deer when he saw a blue deer

(1)My 5-year-old niece saw the blue deer on my shirt and liked it, saying, “He’s a boy deer.”
(2)I’ve got her sitting down, Olivia, not all boys. She could be a deer. Girls like you can use blue
(3)And I told him
(4)Olivia stared at me and had horns, so he’s a boy
(5)I think I should give my degree to my nephew