85mm vs 135mm Lenses for Portraiture: Which One Should You Work With?

One of the things that many portrait photographers and headshot photographers struggle with is figuring out whether they should get a 135mm or 85mm focal length for their portraiture. It's a tough question if you don't understand how one lens works vs the other option. In truth, they both do different things, but I'm not sure that there's a great reason why a photographer would want to have one vs the other option. They're both lens focal lengths that can do very specific things and do them very...