Good Morning Britain Guest Sparks Debate After Admitting She Uses Same Bath Water As Her Family To Avoid Waste

And it was about bath water...

While some viewers agreed that this is what they'd been doing for years, to save on the water bill and do their bit for the environment, there were others who were positively horrified by the whole idea, and made their voices clear.

"Do you know it's really weird, I'm so amazed by what a furore this has bought out because its a thing in my childhood," Sarah said.

"Even now if a sibling comes to stay - normally a spouse will come down and be like, 'I've left the bath in, does anyone want it?', and thats kind of a normal thing to say.

"I'm really surprised that that's made everyone so hot under the collar, to be honest".

But fellow show guest, Luisa Zissman wasn't having it.

When asked by Susanna what she would say if her husband told her he'd left the bath water in, she replied with a smirk: "Just drain it then".

Sarah tried to reason that it was no different to getting in a jacuzzi, but Luisa wasn't so sure, replying that the difference was a hot tub or jacuzzi is chlorinated, and therefore cleaner.

"This isn't unusual for those of us growing up 60s and 70s," someone said on Twitter, after watching the debate. "It was like Sarah said when the water tank has used all the hot water you have to wait for it to get hot again. But surprised nobody's said its more environmentally friendly (sic)".

"I would share bath water with anyone I would share a bed with. There are probably more skin cells shed in a bed than a bath," a third wrote.

However, others were not so sure.

"[I'm] shocked to see how many think this is normal," one wrote.

While another penned: "She may as well jump in the sink with the dishes.... really in this day and age you share your bath water?"

Another exclaimed: "What next? Sharing [toiler paper emoji]?".

Looks like the jury is still out on this one...