You're right as usual... the 83-84 game was where I learned to open beer bottles with my teeth.... this shows how different football was even in the 80s:
I was on John Street West Terrace with 3 or 4 of my mates, and there were 4 WIgan fans there - mostly about 50-60 years old.  They were a little bit well-oiled, and were chatty with us.   (They were staggered they even went in front and were loving being at BDTBL).
They'd also brought bottles of beer into the ground, but forgot a bottle opener.... or lost it... or chucked it at someone....   Anyway, while trying to work out how to open their beer I jokingly volunteered to open one with my gob...  challenge was then set and they wound everyone up to cheer me on.
"Bugger", I thought.. "I have to do this now.... "  Dumb male, Sheffield pride and all that.   So I dug a tooth in, and levered a bit, then a bit more, felt it begin to move, and then a bit more and a bit more, and off it popped!!!
Hero!!!!
Guess what I spent the next 10 minutes doing?   I got a couple of free beers out of it though, and no damage!!!!
I can still do it now... secret is a long cannine tooth and a lot of downward pressure to splay the lid....    Aaaahhhhh   the memories.