It probably has no vent. The vent is used to allow air pressure to get around the material that is going down the drain and prevents the water in a p-trap or toilet from being sucked out as the water goes down the drain past it. Sometimes the vent is there but blocked. Sometimes no vent was installed. It can be a serious problem, especially if sewer gas leaks into the home when the toilet makes that noise.
Your sewerline is developing a blockage and needs to be dealt with asap. Get a plumber out to clear the blockage before it gets worse.
The main line going out is getting clogged or has collapsed.
Sounds like they share a common pipe to drain.
Because your drain is blocked.
Keep the dirty laundry upstairs.
no proper flow.partailly blocked pipes which fill up to capacity with shower water which eventually slowly drains; the flow from a flushing toilet after some time(you stated; 45 minutes) is simply because the shower wated has drained....clean the pipes check for roots from neighbouring trees/shrubs, remove ,seal the hole and the flow should normalise
This medication causes lots of gas that causes a laxative effect.
you stop taking what your taking and see doctor
Simply dancing while taking a shower is called shower dance :)
There really are no health effects of taking a shower at midnight. If you cannot sleep a shower may relax you enough to help you sleep.
not taking a bath
No you can not.
Yes.
No.
To put on your head and keep your hair dry while taking a shower.
by taking a shower......you stupid