Which sexual "immorality" is worse?

-Consentual sex between parent and off-spring (any age)? 
-Consentual sex between siblings? 
-Consentual sex between cousins?
-Consentual sex between pre-adult/teen and pre-adult/teen? 
-Consentual sex between pre-teen and pre-teen? 
-Consentual sex between pre-adult/teen and pre-teen?
-Consentual sex between an adult (other than parent/grandparent/etc.) and pre-adult/teen? (Assume the pre-adult/teen understands sex and does consent--legality is not the issue here)
-Consentual sex between an adult (other than parent/grandparent/etc.) and a pre-teen? (Assume the pre-teen understands sex and does consent--legality is not the issue here)
-Consentual sex between an adult and an adult who are un-wed?

Again, legal ramifications are not at issue, only your own personal "morality" towards these specific pairings.

>>18
I don't understand 8. Why, exactly, would not having sex -- let alone for three months -- be a capital offense? I'm 20 and I've never had sex in my entire life. What have I done wrong?