No, there are no laws for dating just for sex where the minor have to have reached the age of consent in the state or country. So this is up to your parents to decide.
Yes. He is an adult at 23 and she is a minor at 17. It is illegal.
Yes
it isn't illegal to date, but it is illegal to have sexual intercourse.
No, it is only illegal when you are over 18, its not illegal to date anyone younger or either older than you
No! That would be illegal.
Dating is not illegal; sex is illegal.
Dating itself is very rarely illegal in most countries and states. What might be illegal is sex.
Yes it's legal
Its not illegal to date but you cannot have sex. It would be classed as rape on the 20year old boy.
No.
No. That would be illegal.
No, it's not, however, it's not recommend.