It sounds as though your Plumbing is connected. You really need to get a plumber as this is a serious health hazard. Just think if it went back the other way?
A half-bath consists of a sink and toilet. A full-bath consists of a sink, toilet, bath and shower and a three-quarter bath consists of a sink, toilet, and stand-up shower.
Well sometimes using a toilet is just plain out DISGUSTING!!! Even a urinal or if a toilet is full of crap in it. Men just goes up to the sink and pees just like peeing in a garbage can! Sometimes ur bored and you gotta pee. so you pee in weird places.
Because of the water having to fill the boat up to sink it
It's possible that you have a blockage, on the toilet line and the water is coming up in the tub to alleviate pressure. Or, your vent may be clogged causing what is called back syphonage, causing the water not to push out.
Straws don't really float they will sink because they will fill up with water and sink.
It looks like a sink and toilet combined...It squirts water up ur a$$ to clean out any left overs
Use dynamite to blow it up. If there's water down there it should start to rise&&fill up the sink hole.
2 and 1 half
If the meaning behind your question is "does the water go clock-wise or counter clock-wise down a sink or toilet" then the answer is, it depends on the design of the sink or toilet, try this yourself, fill a sink up, pull the plug, when the water is going down (say clock-wise) swirl you finger in the water counter clock-wise and the water will go down that way, proving that it does not matter.
The main toilet pipe is partly plugged after where the upper pipe joins the lower one.
Yes -If you have a stopper to fill it up with water.
This could happen due to improper plumbing, or due to a clog. If the waste water is coming up through a sink and not a toilet, it's more likely that an upstairs toilet and a downstairs (or lower) sink share a waste stack that is clogged below a shared junction between the two.