It's not literally exponential, as in it's not x^x.

Let's just say that for every 1 bad woman there is, they corrupt 1.2 peoples minds for the rest of their lives each year. X = the number of women currently bad. Y equals the number that are bad after that year. Let's start out in the year 2000 for the sake of it and say 1% of women were bad then. The world pop then was just over 6 billion, so half of that is 3 billion. 1% of 3 billion is 30 million. So let's solve.

Y = X*1.2

Y = 30 000 000*1.2

Y = 36 000 000

year 2001 = 36 000 000

Y = 36 000 000*1.2

Etc etc

I guess this could be expressed as Y = X(1.2Z) where z is the number of years passed. So if we take that 30 million as X and input 25 years as Z, then we get 900 000 000. The current world pop. is ~8 billion, that's about 23% of the female population today.

Of course, I have not clue what the actual amounts or conversion rates are, but hopefully you can see how out of control it can get.