All mushrooms are edible. Some are only edible once.
(Terry Pratchett)
I never saw a mushroom that I could eat again after I'd eaten it
No, but in some cases you could eat a second mushroom the day after you ate the first one.
I have been known to do this on occasion
Which means you ate one of those mushrooms which are "edible more than once".
Some other mushrooms are edible, but will be the last thing you ever eat.
Get it yet? ;)
I understood the joke. If you like, I could explain why my post was funny?
It reminds me a science from the Matrix, when a guard asks "Would you please remove any metallic items you are carrying: keys, loose change..." just instead of weapons - shrooms.
In my head, it's the same scene, but the soundtrack is now from Mario.