'Normal' is a strange English word. Mathematically, it means 'forming a right angle'. Scientifically, it means 'conforming to scientific laws'. Chemically, it defines the strength of a solution. Statistically, it can mean a mode or an average. Biologically, it describes an organism working without any defect. Now, all those definitions assume that something is absolutely right and true. However, socially, 'normal' means 'what is usual' - and that is assumed to be 'what is right' ... even when it is wrong according to God.