Is it weird that im a boy and i love the smell of my cousin's vanilla cupcake perfume?
It is not weird at all. Different people have different preferences for their perfumes. The Vanilla cupcake perfume, though designed for females, may have the smell that you like. You can therefore purchase it for yourself.
you may like the sweet smell of vanilla or sugar or how a girl should smell to you. its totally not weird just how you are