That the poo smell in the downstairs toilet, which you spent a couple of years trying to fix, bottles of bleach, resealing, and cursing the plumber who put it in, wasn't the toilet at all, but the sink, which was blocked down the outside pipe, causing a vacuum, which then went back up the toilet!!!
The toilet cistern also blew a bolt, because of all the bleach you poured into it, and flooded the floor. DH fault, not mine, I told him not to do it!!