More than anything that is a metaphor. Any thinking person won't shoot a shotgun with the but on their forehead. It would literally hurt...other than the little 410 of course. But In teaching i regularly put my chin on top of the stock just to show students that you can break the target from wherever you put your face...as long as you do it the same way everytime and just LOOK at the TARGET. I don't shoot the 12 ga too awful much anymore. Just too much recoil. Didn't say I couldn't...just said I don't have to shoot it. After a million or so shells recoil does accumulate. After all those 12 ga shells I am surprised I can still shoot it. To give you a case in point about light 12 ga loads A fellow here in Cody loads 7/8 oz 12 ga loads..mainly for cost savings and recoil reduction. Shot a couple of his "light" loads in a nice fairly heavy 12 double...pretty gun...but holy crap. They weren't light. They kicked a lot harder than my 20 ga 1200 FPS loads. Chrono'd 2 of those shells and they were pushing 1450 FPS. He was really doing his granddaughter a favor teaching her to shoot with that gun and loads. No wonder he couldn't shoot it either. I got his loader set up with a nice 7/8 oz load at 1155 fps and now he can shoot that gun. He ran his first 25 with that gun and load just yesterday..after about 8 months of trying. His granddaughter had a little trouble holding up my Krieghoff but could actually break targets with it...in 28 ga. She'll be back in August...and I am already set up to give her a few lessons. And giving gramps a few lessons in loading too.
A case in point about shotshell loaders(people). I sold shooting stuff for over 35 yrs. One out of 10 shotshell loaders had a powder scale. Seriously..1 of 10. They all took it for granted that the bushings threw what the chart said. Sure they do...every time!

Oh and Red and Green Dot are just alike and 700X is a great 28 ga powder...and...oh y'all get it.