"dancing"
no
Providing the relationship is non-sexual it should be OK.
Yes, of course. You can have a non-sexual relationship with anyone? Is their something you are not mentioning?
yes an active 3 year old child will sleep longer than a non active 3 yaer old because she/he will get tired and fall asleep
Yes, if the parents allow it you can have a non-sexual one.
Yes
If the parents agree, yes.
There are no laws about ages and dating. However, any sexual contact could result in criminal charges against the 16 year old.
non P
Of course, why not? There's nothing wrong with it.
Carbohydrates are non-essential.