Toilet paper! How much will last you a month?

[Boxingshibes]

I do a big shop at the beginning of the month. This includes what toilet paper is think we will need.
It's the 11th so about half way through the month.
I've been buying ever increasing amounts of toilet paper.
Last month 31st October I bought 2×24 rolls. We have 3 toilets. I downstairs. An ensuite and a bathroom. Neither me or dh go into the bathroom.

It is solely used by 2 teenagers dds.
They have 2 rolls out of 24 left!!
I have about 16
WTF are they doing with it?? Eating it??
Ffs
Ainbu to think 2 people can use 24 toilet rolls or less in 1 month?
Aibu they are teenagers and use more?

If i am home all day i can easily use one roll a day

3-4 a week, two adults (both WFH full time) and one 10 yr old, plus quite frequent overnight visits from the in-laws

We seem to get through a roll a day between 3 adults.
But like a PP I have a sensitive bladder so wee a lot. Heavy periods. And dodgy bowels.

We use 9 a week x4 adults

I buy the Andrex extra large rolls and get through one in two days. Just me. I use the toilet a lot and also WFH two or three days a week which increases usage.

At least one bordering on two rolls a day here, often more if me and the older two dds have our periods at the same time. Dh has a stoma bag though and uses quite a lot to mop up his bag opening etc, though tbf, he used a bloody lot even pre colitis.

1 Who Gives a Crap box of 48 bamboo rolls lasts 8-9 months.
3 bathrooms and 4 adults, 2 of whom are at home a lot.

Am flabbergasted by some of these answers!