I hear quite a bit about how a stock that "fits" will reduce felt recoil(among other things). Could someone explain how this happens and how I go about figuring out what kind of stock "fits" me the best. Thanks.

Biden's most truthful quote ever came during his first press conference, 03/25/21.
Drum roll please...... "I don't know, to be clear." and THAT is one promise he's kept!!!