Does every person have an affair at some stage in their life?

Whether it's acceptable or not?

I'm not trying to normalise it but, I feel like every person I know has either been in one knowingly, unknowingly or been the partner of someone having had one.

And this ranges from people in their 20's as far up to my grandmother age, who's in her 80's.

Basically meaning she has stories of men and woman who had affairs whether emotional or physical.