Of course it is, why wouldn't it be? There are not many things you can not do when you are menstruating.
Yes it is.
Yes, it's perfectly safe to!
Because you have a fungal infection and you can pass it to your partner.
Messy but it is safe.
Yes
Yes it is safe
no
Yes, it is. Really, its safe to eat anything, though greasy food will probably make you feel sick.
NEVER wear tampons when not menstruating - it's not safe and no need.
Yes
Yes, it is perfectly safe to do so, unless there are medical reasons not to.