I think because you're supposed to live with someone else...

yes. but that does not explain why there are four toilets.

There are four?!

yes.

I need to come over sometime and witness this

do you need to use a toilet?

No, I'm not in need of a toilet.

because I have plenty to spare.

I already have one. I have an extra bed.

Maybe they put extra things in different places

I wonder why you have extra toilets and I have an extra bed.

I have two extra. they came with the extra room. I guess you can't ask them to get just a single extra bed.

So, they're "as is?"

I think so.