Physically, a father could finger his daughter. However, all cultures frown on such practices, most countries make it illegal, and, if the daughter is under age, it is considered to be child sexual abuse.
No V
yes
your ring finger. the finger next to your pinky. when on other fingers it may seem to get in the way
yes
YES!
If you really want to marry your uncles grandaughter.It is not illegal.
no, they are now illegal
That's sexual contact. In the US 13-years-old + sexual contact = very illegal.
Sexual contact may very well be illegal. Consult the laws for the place where you live.
In the story of Rumpelstiltskin, he pricked his finger on a spinning wheel while trying to turn straw into gold for the miller's daughter.
In Malaysia it is seen as rude, and they thoroughly think that such an act of disrespect is worth punishment, therefore it is illegal.
A husband sleeping with his daughter is considered child abuse if the daughter is a minor and is always incest, and illegal act.