Assuming it is a ceramic toilet. No.
However if it is an old mild steel toilet and the enamel is cracked, the acetic acid in vinegar will eventually eat through it.
No, it will not hurt you.
yes just don't get hurt
Lots of it will.
No
go to toilet often when you have feelings
No.
No, it will not affect them
yes, wiping vigorously with toilet paper can irritate the skin around the anus, making it itchy or sore
They all do. If it's not the sugar causing cavities it's the bubbles causing the enamel to get thinner.
Find a toilet and go pee.
Vinegar cleans out your system. It may be an acid but it does not hurt you You do not take it every day. I take it because of the craving Ihave for it.
Yes. In addition to harboring diseases, toilets hurt when you hit your head against them as you pass out after throwing up.