There's a whole heap of perversion! Much of it is linguistic.....
Consider 'normal' and 'average'. I find the mathematical approach helps. When it comes to sexual orientation it is 'normal' to be heterosexual (I.e. different sex) as opposed to homosexual (same sex). However a population without homosexuals would be abnormal.
(Don't forget those words stem from Greek, not Latin so the inventors of the word homophobe were no Classicists. It means 'fear of the same' which is the exact opposite of what they intended. However, I digress!)
Mathematically 'normal' describes a distribution, a natural range of positions
View attachment 15136
where most of the population is in the middle ground with fewer and fewer at the edges the weirder you get. (Weird is a pejorative word which I use to describe something literally eccentric (farther from the middle) but it highlights the importance of perspective looking from the middle out rather than the outer edge in......) So, it turns out that it is entirely normal to have gay people in the population but being gay isn't normal; it's an outlying position.
When it comes to 'average' you have a similar problem. You can add your totals up and divide them by the number of totals to find an average but that's a middle line that doesn't cover most people who are either side of the line. Mathematically we distinguish the 'middle average' (the median being the absolute middle value) as the 'mean' but also have a 'mode' which is the most common grouping where the greatest population lies.
Consequently you end up with a standard deviation
View attachment 15137
And we're all in there somewhere. Deviants, the lot of you!
Happy now?