re: How do you shave yall's beards?

Tuck your chin as tight as you can. Put a finger horizontally in the lowest fold at your throat. Keep your finger there, and raise your chin back up to a normal resting position. Your finger location likely marks a very reasonable low shave line. Slowly taper the line up to *below* the points of your jawbone. That's going to be flattering to most face shapes. Feel free to fine tune from there.

If you have some bizarre combo like Lucas, godspeed.