It’s still in use in Yorkshire too, though pretty rare.

Comment has a typo in it; it sholud be typo not typoo ☝️🤓

There’s a short summary in this article:
IFL Science: Pavlov’s Dog Experiment Was Much More Disturbing Than You Think

I’m not certain on the accuracy of everything it’s saying, but other sources at least seem to agree he was originally studying digestion, and cut holes in the dogs’ throats so the food would fall out when they ate.

In the UK, at least, the beans thing is simply:

Will you give money to charity?
No

If someone sits in a bathtub full of cold baked beans for eight hours, will you give money to charity?
Yes

As for the suffering, it might sound ridiculous, but it appears to be a recognised tactic for fundraisers.
The Conversation: The Martyrdom Effect - Why your pain boosts a charity’s gain

I think there’s a little difference between charity in general and “charity events” or “fundraisers”.

One one hand, you’ve got people personally deciding to give some money towards something they chose to support, which is great.

But sponsored fundraisers are actually a bit weird.

Fundraiser: “Hi, would you like to donate £10 to help cure cancer?”

Potential donor: “I’m an incredibly wealthy man, so I can easily afford that… but… you just want me to give you some money in exchange for nothing?”

Fundraiser: “It’s not nothing - you get to know you’ve helped a worthy cause, made the world a better place…”

Potential donor: “No… unless… no, sorry, that’s ridiculous…”

Fundraiser: “No, wait! Tell me your idea!”

Potential donor: 'Well, I could probably give you some money… if someone suffered."

Fundraiser: “Suffered?!?”

Potential donor: “Yes, I want you to make a fat, asthmatic man run a marathon, dressed in a really awkward, incredibly warm costume that makes him look ridiculous. If he suffers enough, you can have your £10 for whatever it was you were on about.”

Fundraiser: “Curing cancer is seen to be a good cause - are you sure you couldn’t just donate the money?”

Potential donor: “Yes. I can only give away a tiny pittance of money if there is suffering. You could also make the man sit in a bathtub full of beans for a whole day. I imagine that’s unpleasant enough to appease my hunger for suffering.”

Surely we all agree this whole concept is a bit weird?

From where I lived, just the lager and cider together was snakebite, and with blackcurrant it was a “snakebite and black” - but I think there was a lot of regional variety (in the UK, at least).

I have heard lager/cider/blackcurrant called a snakebite before though (I remember it causing a disagreement in the pub) - but I’ve also heard it called a “diesel” (which elsewhere was something mixed with guinness). I’m pretty sure you sometimes got different things in different pubs in the same town.

I suppose pre-internet, we were just relying on the drunk people ordering things to decide what they wanted to call stuff (“what was that purple mixed drink called that made me throw up on my own shoes?”).

Mix rice up with tomato sauce, melt a bit of mozzarella cheese in, some slices of pepperoni in it, sprinkle in some basil and oregano… check behind you that nobody can see you commit culinary crimes… delicious.

To (controversially) go one step further, all unsweetened carbohydrate bases are interchangeable.

You can put pasta topping on a pizza, you can put pizza topping on rice, you can put toastie fillings on a potato waffle and it always ends up nice.

Pubs in the UK used to (or still do?) have blackcurrant and lime cordial for this.

“Lager and Lime”, “Lager and Blackcurrant” and “Cider and Blackcurrant” were pretty common 20-30 years ago. A shot of cordial (concentrated juice), then filled up with lager beer.

There was also orange cordial behind the bar, but nobody ever drank “Lager and orange”. I believe it was some form of crime.