"The gender binary, also referred to as gender binarism (sometimes shortened to just binarism), is the classification of sex and gender into two distinct, opposite and disconnected forms of masculine and feminine. Gender binary is one general type of a gender system."
I think I might give reassignment a go, I quite fancy being flat chested, having strong shoulders and arms, but I don't want to be reconstructed below the waist thank you very much, bush rather than baubles if you get my drift lo1!